| Maven Securities | Prime Factor Visitation | Coding |  | 🔥 Aug 26, 2026 |
| Maven Securities | Resource Allocation | Coding |  | 🔥 Aug 26, 2026 |
| TikTok | Event ID Check Completion Times | Coding |  | 🔥 Aug 26, 2026 |
| TikTok | Leftmost Memory Block Allocator (for mle also :) | Coding |  | 🔥 Aug 26, 2026 |
| TikTok | Find Sum Pairs (for mle also :) | Coding |  | 🔥 Aug 26, 2026 |
| TikTok | Reverse Letters in Pairs | Coding |  | 🔥 Aug 26, 2026 |
| TikTok | Sort Matrix Borders | Coding |  | 🔥 Aug 25, 2026 |
| TikTok | Count Even-Digit Numbers | Coding |  | 🔥 Aug 25, 2026 |
| Goldman Sachs | Maximum Ones After K Operations | Coding |  | 🔥 Aug 24, 2026 |
| Microsoft | Maximum Products by Budget | Coding |  | 🔥 Aug 24, 2026 |
| TikTok | Repeated Grouped Digit Sum | Coding |  | 🔥 Aug 24, 2026 |
| Airbnb | Progressive Banking System | Coding |  | 🔥 Aug 23, 2026 |
| Citadel | Maximize Workday Earnings | Coding |  | 🔥 Aug 23, 2026 |
| Citadel | Minimum Changes for Palindromic Blocks | Coding |  | 🔥 Aug 23, 2026 |
| Google | Assign Locker | Coding |  | 🔥 Aug 23, 2026 |
| Microsoft | Minimum Fuel Cost Between Cities | Coding |  | 🔥 Aug 23, 2026 |
| Barclays | Allocate Workers for a Production Ratio | Coding |  | 🔥 Aug 22, 2026 |
| Google | Directed Graph Reachability Queries | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Phone Spam Report Counter | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Minimize the Longest Hike Between Rest Stops | Coding |  | 🔥 Aug 21, 2026 |
| Netflix | Undo and Redo Command History | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Count Ordered Combination Sums with Negative Values | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Count Ordered Combination Sums | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Fixed-Length Combination Sum | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Combination Sum with Single-Use Values | Coding |  | 🔥 Aug 21, 2026 |
| Pinterest | Combination Sum with Reusable Values | Coding |  | 🔥 Aug 21, 2026 |
| Affirm | Assign Sequential Loan Identifiers | Coding |  | 🔥 Aug 21, 2026 |
| Affirm | Normalize Loan Merchants to Root Businesses | Coding |  | 🔥 Aug 21, 2026 |
| Apple | Design Hash Map | Coding |  | 🔥 Aug 21, 2026 |
| Rippling | Delivery Cost Tracker with Effective-Dated Rates | Coding |  | 🔥 Aug 21, 2026 |
| ByteDance | Search in a Rotated Sorted Array with Duplicates | Coding |  | 🔥 Aug 21, 2026 |
| OpenAI | One-Nearest-Neighbor Classification | Coding |  | 🔥 Aug 21, 2026 |
| OpenAI | Plant Infection Simulation, Part 4: Death Countdown | Coding |  | 🔥 Aug 21, 2026 |
| Illumio | Least Recently Used Cache | Coding |  | 🔥 Aug 21, 2026 |
| Cursor | Filesystem Hash Tree | Coding |  | 🔥 Aug 21, 2026 |
| Google | Minimum Racks for Server Resources | Coding |  | 🔥 Aug 21, 2026 |
| Meta | First Common Ancestor with Parent Pointers | Coding |  | 🔥 Aug 21, 2026 |
| Meta | Minimum Removal for Balanced Parentheses | Coding |  | 🔥 Aug 21, 2026 |
| Google | Count Prefix Paths in a Character Graph | Coding |  | 🔥 Aug 21, 2026 |
| Airbnb | Cloud Storage with User Backup and Restore | Coding |  | 🔥 Aug 21, 2026 |
| Anthropic | Task Management System | Coding |  | 🔥 Aug 21, 2026 |
| Amazon | Unfulfilled Customers by Inventory Priority | Coding |  | 🔥 Aug 21, 2026 |
| General Motors | Per-Client Sliding-Window Rate Limiter | Coding |  | 🔥 Aug 21, 2026 |
| Amazon | Minimum Grid Inconvenience | Coding |  | 🔥 Aug 21, 2026 |
| Stripe | Request Routing System | Coding |  | 🔥 Aug 21, 2026 |
| Netflix | Timed Cache with Sidecar Cleanup | Coding |  | 🔥 Aug 21, 2026 |
| ByteDance | Count Numbers with an Even Digit Count | Coding |  | 🔥 Aug 21, 2026 |
| ByteDance | Sorted Absolute-Difference Sums Across Cyclic Shifts | Coding |  | 🔥 Aug 21, 2026 |
| ByteDance | Sort Concentric Matrix Borders Clockwise | Coding |  | 🔥 Aug 21, 2026 |
| ByteDance | Count House Segments After Sequential Destruction | Coding |  | 🔥 Aug 21, 2026 |
| Quince | Minimum Sprinklers to Cover an Interval | Coding |  | 🔥 Aug 21, 2026 |
| Quince | Check a Repeated String as a Subsequence | Coding |  | 🔥 Aug 21, 2026 |
| Temu | Merge Two Sorted Collections Without Duplicates | Coding |  | 🔥 Aug 21, 2026 |
| Meta | Maximum Unique-Character Word Subset | Coding |  | 🔥 Aug 20, 2026 |
| Meta | Validate a Palindrome After Limited Deletions | Coding |  | 🔥 Aug 20, 2026 |
| Meta | Minimum-Sum Root-to-Leaf Path | Coding |  | 🔥 Aug 20, 2026 |
| Nuro | Schedule Buffered Video Playback | Coding |  | 🔥 Aug 20, 2026 |
| Nuro | Reveal a Minesweeper Region | Coding |  | 🔥 Aug 20, 2026 |
| Airtable / Meta | Design a Backend Search Engine | System design |  | 🔥 Aug 16, 2026 |
| Amazon / Lyft / Google | Design a Web Crawler | System design |  | 🔥 Aug 16, 2026 |
| Zoox / Uber | Design a Nearby Autonomous Vehicle Search Service | System design |  | 🔥 Aug 16, 2026 |
| Amazon | Design a Multi-Branch Library Management System | System design |  | 🔥 Aug 16, 2026 |
| LinkedIn | Design a Ranked Hybrid Social Feed | System design |  | 🔥 Aug 16, 2026 |
| DoorDash | Build a Refund DAG with Local HTTP Services | AI coding |  | 🔥 Aug 15, 2026 |
| Amazon / Meta | Design a Cloud File Storage System | System design |  | 🔥 Aug 15, 2026 |
| DoorDash | Food Review System | System design |  | 🔥 Aug 15, 2026 |
| Postman / Anduril | Design a URL Shortening Service | System design |  | 🔥 Aug 15, 2026 |
| Snowflake | Design Calendar Client State and Recurrence | System design |  | 🔥 Aug 15, 2026 |
| Salesforce | Design a Goal-Driven Tool-Using Agent | System design |  | 🔥 Aug 15, 2026 |
| OpenAI | Design a Distributed Video Generation Platform | System design |  | 🔥 Aug 14, 2026 |
| Attentive | Design a Time Series Metrics Database | System design |  | 🔥 Aug 14, 2026 |
| Giga | Design a Browser-Automated Customer Support Agent | System design |  | 🔥 Aug 14, 2026 |
| OpenAI | Design In-Store Merchant Payment Reconciliation | System design |  | 🔥 Aug 14, 2026 |
| Rippling / Amazon | Design an Event Ingestion Platform | System design |  | 🔥 Aug 14, 2026 |
| Spotify | Design a Personalized Session Playlist Ranking System | System design |  | 🔥 Aug 14, 2026 |
| Netflix / Oracle / Google / Meta | Design a Personalized Recommendation System | System design |  | 🔥 Aug 13, 2026 |
| Anthropic | Design Peer-to-Peer Model Distribution | System design |  | 🔥 Aug 13, 2026 |
| OpenAI | Design a Distributed Crossword Solver | System design |  | 🔥 Aug 13, 2026 |
| Meta | Design a Multimodal Public-Content Safety Platform | System design |  | 🔥 Aug 13, 2026 |
| Databricks | Online Bookseller Platform | System design |  | 🔥 Aug 13, 2026 |
| Anthropic | Inference Engine (Fellow Program :D | AI coding |  | 🔥 Aug 12, 2026 |
| Anthropic | Debug Extremely Randomized Trees (Fellow Program :) | AI coding |  | 🔥 Aug 12, 2026 |
| DoorDash / Robinhood / Snowflake / Postman / Figma | Design a Scheduled Job Execution System | System design |  | 🔥 Aug 12, 2026 |
| OpenAI / The D. E. Shaw Group / Zoox | Design an Online Payment Processing System | System design |  | 🔥 Aug 12, 2026 |
| Figma | Design Comments for a Collaborative Canvas | System design |  | 🔥 Aug 12, 2026 |
| OpenAI | Design an Online Chess Platform | System design |  | 🔥 Aug 12, 2026 |
| Anthropic | Design a Model-Weight Deployment Platform | System design |  | 🔥 Aug 12, 2026 |
| Anthropic / Snap Inc. | One-to-One Chat Service | System design |  | 🔥 Aug 12, 2026 |
| Goldman Sachs | Design a Live-Stream Chat System | System design |  | 🔥 Aug 12, 2026 |
| Goldman Sachs | Design an In-Memory Job Scheduler | Low-level design |  | 🔥 Aug 12, 2026 |
| Coinbase | Design a Brokerage Order Processing System | System design |  | 🔥 Aug 12, 2026 |
| ByteDance | Design a Multimedia Content Moderation Platform | System design |  | 🔥 Aug 12, 2026 |
| Mercor | Design a Unique Username Registration System | System design |  | 🔥 Aug 12, 2026 |
| Shopify | Design an Extensible Text Editor | Low-level design |  | 🔥 Aug 12, 2026 |
| Snap Inc. | Build a Persistent Chat Backend | AI coding |  | 🔥 Aug 12, 2026 |
| Snowflake | Design a Fault-Tolerant Cloud Queue Service | System design |  | 🆕 Aug 11, 2026 |
| Apple | Design a Mobile Application Event Collection API | System design |  | 🆕 Aug 11, 2026 |
| Rippling | Design a Room-Type Hotel Booking System | System design |  | 🆕 Aug 11, 2026 |
| Pinterest | Design an Ad Event Measurement Platform | System design |  | 🆕 Aug 11, 2026 |
| Apple | Design an Analytical Data Dashboard | System design |  | 🆕 Aug 11, 2026 |
| Databricks | Design an LLM Content Safety Service | System design |  | 🆕 Aug 11, 2026 |
| Google | Design a Real-Time Anomaly Detection Service | System design |  | 🆕 Aug 10, 2026 |
| Amazon / Oracle | Design a Netflix-Style Streaming Platform | System design |  | 🆕 Aug 10, 2026 |
| Uber | Design a Driver Review Leaderboard | System design |  | 🆕 Aug 10, 2026 |
| Oracle | Design a Remote Browser Isolation Service | System design |  | 🆕 Aug 10, 2026 |
| Pinterest | Design a Blackjack Table Game | Low-level design |  | 🆕 Aug 10, 2026 |
| Spotify | Design a Weekly User Activity Prediction System | System design |  | 🆕 Aug 10, 2026 |
| Anthropic | Design Production ML Serving Observability | System design |  | 🆕 Aug 10, 2026 |
| Apple | Design an On-Prem Media Transfer for Cloud GPU Training | System design |  | 🆕 Aug 09, 2026 |
| OpenAI | Payment Hold, Charge, and Settlement | System design |  | 🆕 Aug 07, 2026 |
| Zoox | Design a Real-Time Fleet Location Display | System design |  | 🆕 Aug 07, 2026 |
| Figma | Design Trending Design Files | System design |  | 🆕 Aug 07, 2026 |
| Anthropic | Repair an Agent and Reduce Its Turn Count | AI coding |  | 🆕 Aug 06, 2026 |
| Amazon / Wayfair | Design a Multi-Floor Parking Lot | Low-level design |  | 🆕 Aug 06, 2026 |
| Zscaler / Amazon / Walmart | Design a Global Service Metrics Monitoring and Alerting Platform | System design |  | 🆕 Aug 06, 2026 |
| Rippling | Design a Frontend News Feed with Offline Virtualization | System design |  | 🆕 Aug 06, 2026 |
| Netflix | Design a Grounded Recommendation Chatbot | System design |  | 🆕 Aug 06, 2026 |
| Wayfair | Design an Audio Fingerprint Recognition Service | System design |  | 🆕 Aug 06, 2026 |
| Amazon | Design an ML Training and Deployment Platform | System design |  | 🆕 Aug 06, 2026 |
| Anthropic | Design Opaque-GPU Inference Capacity | System design |  | 🆕 Aug 06, 2026 |
| Pinterest | Design Viral Comment Notification Aggregation | System design |  | 🆕 Aug 06, 2026 |
| infosys | Design Offline-First Document Autosave and Synchronization | System design |  | 🆕 Aug 06, 2026 |
| Otter.ai | Design a Meeting Bot Allocation and Status Platform | System design |  | 🆕 Aug 06, 2026 |
| Headway | Design Vacation Rental Listing Search | System design |  | 🆕 Aug 06, 2026 |
| Headway | Fixed-Window Rate Limiter Middleware | AI coding |  | 🆕 Aug 06, 2026 |
| Headway | Repair Insurance Eligibility Status Projection | AI coding |  | 🆕 Aug 06, 2026 |
| TikTok | Distribution Center Package Allocation | Coding |  | 🆕 Aug 05, 2026 |
| Rippling | Design a Personalized News Aggregation Platform | System design |  | 🆕 Aug 05, 2026 |
| Netflix | Design Advertising Order Lifecycle Tracking | System design |  | 🆕 Aug 05, 2026 |
| Netflix | Design an Advertising Frequency-Capping Service | System design |  | 🆕 Aug 05, 2026 |
| TikTok | Concatenate Digit-wise Sums | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Count 2x2 Submatrices by Black Cells | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Count House Segments After Destruction | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Debugger Breakpoint Actions | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Find All Local Peaks | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Minimum Height Difference Between Distant Peaks | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Minimum Operations for Stepwise Structures | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Rating Level After Changes | Coding |  | 🆕 Aug 05, 2026 |
| TikTok | Space Station Shuttle Missions | Coding |  | 🆕 Aug 05, 2026 |
| Oracle / Retell AI / Apple / Google | Design a Distributed Rate Limiter | System design |  | 🆕 Aug 05, 2026 |
| Apple | Design a Multi-Device Photo Storage System | System design |  | 🆕 Aug 05, 2026 |
| TikTok | Count Case-Insensitive Triplets | Coding |  | 🆕 Aug 04, 2026 |
| TikTok | Linear Warehouse Drone Delivery | Coding |  | 🆕 Aug 04, 2026 |
| Figma | Design Access-Aware Design-File Retrieval and Ranking | System design |  | 🆕 Aug 04, 2026 |
| OpenAI / Figma | Design an Agent Evaluation Platform | System design |  | 🆕 Aug 04, 2026 |
| Capital One | Obstacle Placement Queries | Coding |  | 🆕 Aug 04, 2026 |
| TikTok | Product Minus Sum of Digits | Coding |  | 🆕 Aug 04, 2026 |
| Rippling | Design a Centralized Log Ingestion and Search Platform | System design |  | 🆕 Aug 04, 2026 |
| HSBC | Minimum Satellite Data Transfer Iterations | Coding |  | 🆕 Aug 03, 2026 |
| HSBC | Organization Reputation After Employee Departures | Coding |  | 🆕 Aug 03, 2026 |
| DoorDash | Design a Downstream-Service Alert Notification System | System design |  | 🆕 Aug 03, 2026 |
| Anthropic | Design a Prompt Playground | System design |  | 🆕 Aug 03, 2026 |
| Amazon | Repair the Wallet Loan Marketplace | AI coding |  | 🆕 Aug 03, 2026 |
| Amazon | Design a Playlist Source Mixer | Low-level design |  | 🆕 Aug 03, 2026 |
| Gusto | Design a Restaurant Staff Scheduling System | System design |  | 🆕 Aug 03, 2026 |
| HSBC | Remove Vowels from a String | Coding |  | 🆕 Aug 03, 2026 |
| Infosys | Count Valid A-B-C Sequences Under a Modulo-Four Rule | Coding |  | 🆕 Aug 02, 2026 |
| Infosys | Maximum Product of a Strictly Increasing Contiguous Subarray | Coding |  | 🆕 Aug 02, 2026 |
| Infosys | Minimum Cost to Assign Candidates to Two Cities | Coding |  | 🆕 Aug 02, 2026 |
| OpenAI / Baseten | Design a Stateless Generative AI Chat Service | System design |  | 🆕 Aug 02, 2026 |
| OpenAI | Design a Declarative Infrastructure Orchestrator | System design |  | 🆕 Aug 02, 2026 |
| Baseten | Build a Durable Single-Server Key-Value Store | AI coding |  | 🆕 Aug 02, 2026 |
| Baseten | Parallelize API Calls with a Thread Pool | AI coding |  | 🆕 Aug 02, 2026 |
| Asana | Design a Rectangular Jigsaw Puzzle | Low-level design |  | 🆕 Aug 02, 2026 |
| Salesforce / Replit / Sarvam AI | Design an Event-Driven Notification System | System design |  | 🆕 Aug 02, 2026 |
| Decagon | Design a Multi-Tenant AI Gateway | System design |  | 🆕 Aug 01, 2026 |
| Scale AI | Design an Embedding and Classification API | System design |  | 🆕 Aug 01, 2026 |
| Apple | Design an Online Voting Service | System design |  | 🆕 Aug 01, 2026 |
| Scale AI | Build a CSV-to-JSON LLM Categorization Service | AI coding |  | 🆕 Aug 01, 2026 |
| Superhuman | Reverse a Singly Linked List | Coding |  | 🆕 Jul 31, 2026 |
| Superhuman | Recover a Tree from Preorder Depth Encoding | Coding |  | 🆕 Jul 31, 2026 |
| Superhuman | Deep Copy a Singly Linked List | Coding |  | 🆕 Jul 31, 2026 |
| Superhuman | Deep Copy a Random-Pointer List | Coding |  | 🆕 Jul 31, 2026 |
| Chicago Trading | Design a Pre-Trade Risk Checking System | System design |  | 🆕 Jul 31, 2026 |
| Amazon | Repair MovieDB Search and Recommendations | AI coding |  | 🆕 Jul 31, 2026 |
| Plaid | Design an Embedded Pay-by-Bank Checkout | System design |  | 🆕 Jul 31, 2026 |
| OpenAI | Repair a Deployed Django Rate Limiter | AI coding |  | 🆕 Jul 31, 2026 |
| Amazon | Meeting Rooms II | Coding |  | 🆕 Jul 30, 2026 |
| Microsoft | Maximum Score with Prime Jumps | Coding |  | 🆕 Jul 30, 2026 |
| Visa | Connected Groups | Coding |  | 🆕 Jul 30, 2026 |
| Visa | Perfect Substrings | Coding |  | 🆕 Jul 30, 2026 |
| Oracle | Alphabetically Maximum Substring | Coding |  | 🆕 Jul 30, 2026 |
| Lyft | Stateful Paginated Fetch N | Coding |  | 🆕 Jul 30, 2026 |
| StackAdapt | Nested Recipe Inventory Manager | Coding |  | 🆕 Jul 30, 2026 |
| Snowflake | Distributed Tree Counting State Machine | Coding |  | 🆕 Jul 30, 2026 |
| Snowflake | Maximum Number of Events That Can Be Attended | Coding |  | 🆕 Jul 30, 2026 |
| Amazon | Single Element in a Sorted Array | Coding |  | 🆕 Jul 30, 2026 |
| eBay | K Smallest Elements from Sorted Arrays | Coding |  | 🆕 Jul 30, 2026 |
| eBay | Single-Pass Search in a Rotated Sorted Array | Coding |  | 🆕 Jul 30, 2026 |
| Opendoor | Finite Same-Origin Web Crawler | Coding |  | 🆕 Jul 30, 2026 |
| Oracle | Enumerate Right-and-Down Matrix Paths | Coding |  | 🆕 Jul 30, 2026 |
| Oracle | Maximize Movie Ratings Without Consecutive Skips | Coding |  | 🆕 Jul 30, 2026 |
| DoorDash | Random Dasher Set Operations | Coding |  | 🆕 Jul 30, 2026 |
| Databricks | Key-Value Store with Hit Counter | Coding |  | 🆕 Jul 30, 2026 |
| Oracle | Best Time to Buy and Sell Stock | Coding |  | 🆕 Jul 30, 2026 |
| IBM | String-Pair Frequency Similarity | Coding |  | 🆕 Jul 30, 2026 |
| Netflix / FluidStack | Design a Machine-Learning Job Scheduler | System design |  | 🆕 Jul 30, 2026 |
| Pinterest / Amazon / RedNote | Design a Following News Feed Service | System design |  | 🆕 Jul 30, 2026 |
| Databricks | Chat API and Database System | System design |  | 🆕 Jul 30, 2026 |
| Opendoor | Map-Based Home Search Backend | System design |  | 🆕 Jul 30, 2026 |
| Databricks | Music Playlist System | System design |  | 🆕 Jul 30, 2026 |
| Expedia | Design a Partner Data Aggregation and Query Service | System design |  | 🆕 Jul 30, 2026 |
| Susquehanna International Group | Design a Cash Register with Inventory and Profit Tracking | Low-level design |  | 🆕 Jul 30, 2026 |
| Amazon | Design a Database Partition Split-and-Merge Manager | Low-level design |  | 🆕 Jul 30, 2026 |
| Walmart | Design a Marketplace Product Catalog Platform | System design |  | 🆕 Jul 30, 2026 |
| Amazon | Design and Implement a Streaming Log Handler | Low-level design |  | 🆕 Jul 30, 2026 |
| DoorDash | Design a Three-Day Charity Event System | System design |  | 🆕 Jul 30, 2026 |
| Attentive | Design Retailer Product Catalog Serving | System design |  | 🆕 Jul 30, 2026 |
| Mercury Insurance | Build a Python CRUD API | AI coding |  | 🆕 Jul 30, 2026 |
| Cognitiv | Word Search | Coding |  | 🆕 Jul 29, 2026 |
| Reddit | Chatter Message Window | Coding |  | 🆕 Jul 29, 2026 |
| Amazon | Count the Number of Complete Components | Coding |  | 🆕 Jul 29, 2026 |
| Amazon | Cousins in Binary Tree II | Coding |  | 🆕 Jul 29, 2026 |
| Salesforce | Diameter of an Acyclic Undirected Graph | Coding |  | 🆕 Jul 29, 2026 |
| Squarepoint | Evaluating Circuit Expressions | Coding |  | 🆕 Jul 29, 2026 |
| Rippling | Filter and Sort Scheduled Tasks | Coding |  | 🆕 Jul 29, 2026 |
| Google | Longest Subarray with Sum at Most K | Coding |  | 🆕 Jul 29, 2026 |
| Google | Maximum Sum Path Between Two Leaf Nodes | Coding |  | 🆕 Jul 29, 2026 |
| Amazon | Minimum Operations to Make an Array Continuous | Coding |  | 🆕 Jul 29, 2026 |
| Lyft | Minimum Window Substring | Coding |  | 🆕 Jul 29, 2026 |
| Netflix | Movie Billboard Rotation | Coding |  | 🆕 Jul 29, 2026 |
| Instacart | Product Total With the Cheapest Promotion | Coding |  | 🆕 Jul 29, 2026 |
| Airbnb | Recipe Management System | Coding |  | 🆕 Jul 29, 2026 |
| Instacart | Sort Products by Aisle With Frozen Items Last | Coding |  | 🆕 Jul 29, 2026 |
| Rippling | Stateful Log Transform and Search | Coding |  | 🆕 Jul 29, 2026 |
| Amazon | Vertical Order Traversal of a Binary Tree | Coding |  | 🆕 Jul 29, 2026 |
| Databricks | Bookstore Batch Book-Price API | System design |  | 🆕 Jul 29, 2026 |
| Rippling | Design a Publisher News Feed | System design |  | 🆕 Jul 29, 2026 |
| Rippling | Design an Exact-Room Hotel Reservation System | System design |  | 🆕 Jul 29, 2026 |
| Pinterest / Instacart | Design an Inventory Management Service | System design |  | 🆕 Jul 29, 2026 |
| Amazon | Design Offline Reading-Progress Synchronization | System design |  | 🆕 Jul 29, 2026 |
| Databricks | WAL-Backed Batched Log-Writing System | System design |  | 🆕 Jul 29, 2026 |
| Databricks | Design a Locking Key-Value Store with Batch Writes | Low-level design |  | 🆕 Jul 29, 2026 |
| Databricks | Design a WAL-Backed Batch Log Writer | Low-level design |  | 🆕 Jul 29, 2026 |
| Harness | Streaming Ingredient Dishes | Coding |  | 🆕 Jul 28, 2026 |
| Oracle | Add One to a Number Represented as Digits | Coding |  | 🆕 Jul 28, 2026 |
| Oracle | Top K Frequent Elements with Larger-Value Tie Break | Coding |  | 🆕 Jul 28, 2026 |
| Virtu Financial | Profit Analysis | Coding |  | 🆕 Jul 28, 2026 |
| Virtu Financial | Banking Transaction Exceptions | Coding |  | 🆕 Jul 28, 2026 |
| Virtu Financial | FIX Message Reconciliation | Coding |  | 🆕 Jul 28, 2026 |
| Amazon | HTTP Request Redirection | Coding |  | 🆕 Jul 28, 2026 |
| Google | Split a Log Outside Quotes | Coding |  | 🆕 Jul 28, 2026 |
| Stripe | Group Linked Merchant Records | Coding |  | 🆕 Jul 28, 2026 |
| Apple | Insert Interval | Coding |  | 🆕 Jul 28, 2026 |
| Google | Decode String | Coding |  | 🆕 Jul 28, 2026 |
| Lyft | Nested Transaction Key-Value Store with Value Counts | Coding |  | 🆕 Jul 28, 2026 |
| Lyft | Minimum Workers with Job Assignments | Coding |  | 🆕 Jul 28, 2026 |
| Databricks | Blocking Keyed Cache with Waiting Readers | Coding |  | 🆕 Jul 28, 2026 |
| Google | Phone Keypad Letter Combinations | Coding |  | 🆕 Jul 28, 2026 |
| Google | Count Prefix Matches in a Sorted Array | Coding |  | 🆕 Jul 28, 2026 |
| Uber | Minimum Refueling Stops | Coding |  | 🆕 Jul 28, 2026 |
| OpenAI | Segmented Durable Key-Value Store | Coding |  | 🆕 Jul 28, 2026 |
| Cresta | Particle Moves to Target | Coding |  | 🆕 Jul 28, 2026 |
| Cresta | Top Three Companies by Profit | Coding |  | 🆕 Jul 28, 2026 |
| Cresta | Rightward Bacteria Consumption | Coding |  | 🆕 Jul 28, 2026 |
| Oracle | Design a Healthcare Data Ingestion Pipeline | System design |  | 🆕 Jul 28, 2026 |
| Google | Distributed Quoted-Log Tokenization | System design |  | 🆕 Jul 28, 2026 |
| Lyft | Donation Platform | System design |  | 🆕 Jul 28, 2026 |
| Uber | Rolling Stock Price Alert System | System design |  | 🆕 Jul 28, 2026 |
| Uber | Design and Implement a Parking Lot | Low-level design |  | 🆕 Jul 28, 2026 |
| Uber | Design and Implement Ride Dispatch and Trip Lifecycle | Low-level design |  | 🆕 Jul 28, 2026 |
| Bloomberg | Refactor a Cache for Pluggable Eviction Policies | Low-level design |  | 🆕 Jul 28, 2026 |
| Spotnana | Optimal Card Game Score | Coding |  | 🆕 Jul 27, 2026 |
| Zomato / Eternal | Maximum Production Within Power | Coding |  | 🆕 Jul 27, 2026 |
| Zomato / Eternal | Rearrange Songs by Author | Coding |  | 🆕 Jul 27, 2026 |
| Kikoff | JSON Identity Verification | Coding |  | 🆕 Jul 27, 2026 |
| The Allen Institute for AI | Streaming Step Progress Hierarchy | Coding |  | 🆕 Jul 27, 2026 |
| Airbnb | Parcel Event Tracking | Coding |  | 🆕 Jul 27, 2026 |
| Apple | Group Transitive String Aliases | Coding |  | 🆕 Jul 27, 2026 |
| Nooks | Majority Labels over Audio Intervals | Coding |  | 🆕 Jul 27, 2026 |
| Coinbase | In-Memory Database | Coding |  | 🆕 Jul 27, 2026 |
| Shopify | Deterministic Secret Santa Assignment | Coding |  | 🆕 Jul 27, 2026 |
| OpenAI | Durable String Key-Value Store | Coding |  | 🆕 Jul 27, 2026 |
| Confluent | Match a Variadic Function Signature | Coding |  | 🆕 Jul 27, 2026 |
| Google | Ad Score Scheduler With Delay | Coding |  | 🆕 Jul 27, 2026 |
| Google | Alternating-Color Binary Tree Roots | Coding |  | 🆕 Jul 27, 2026 |
| Spotnana | Minimize Maximum Pilot Workload | Coding |  | 🆕 Jul 27, 2026 |
| Amazon | Resolve Task Dependencies | Coding |  | 🆕 Jul 27, 2026 |
| Google | Route Pattern Matcher | Coding |  | 🆕 Jul 27, 2026 |
| Optiver | Design a News Subscription Processing Engine | System design |  | 🆕 Jul 27, 2026 |
| Brex | Design a Peer-to-Peer Money Transfer System | System design |  | 🆕 Jul 27, 2026 |
| Uber | Design a Price Movement Alert Platform | System design |  | 🆕 Jul 27, 2026 |
| Amazon | Design a Ticket Booking System | System design |  | 🆕 Jul 27, 2026 |
| Distyl AI | Design an Iterative Compound-LLM Defense Generator | System design |  | 🆕 Jul 27, 2026 |
| Hudson River Trading | Design Shared NFS Read Acceleration | System design |  | 🆕 Jul 27, 2026 |
| Amazon | Design an Extensible Multi-Channel Alerting Platform | Low-level design |  | 🆕 Jul 27, 2026 |
| Coinbase | In-Memory Database | AI coding |  | 🆕 Jul 27, 2026 |
| Stripe | Incident Monitor | Coding |  | 🆕 Jul 26, 2026 |
| Airbnb | Worker Management, Part 1: Office Registration | Coding |  | 🆕 Jul 26, 2026 |
| Airbnb | Worker Management, Part 2: Top Workers | Coding |  | 🆕 Jul 26, 2026 |
| Airbnb | Worker Management, Part 3: Promotions and Salary | Coding |  | 🆕 Jul 26, 2026 |
| Stripe | Merchant Fraud Risk Scoring | Coding |  | 🆕 Jul 26, 2026 |
| Boston Consulting Group | Dynamic Pair Sum Queries | Coding |  | 🆕 Jul 26, 2026 |
| Boston Consulting Group | Find a Submatrix Matching a Pattern | Coding |  | 🆕 Jul 26, 2026 |
| Boston Consulting Group | Longest Contiguous Character Run | Coding |  | 🆕 Jul 26, 2026 |
| Boston Consulting Group | Even-Position Monotonicity | Coding |  | 🆕 Jul 26, 2026 |
| Airbnb | Worker Management with Full-Shift Double Pay | Coding |  | 🆕 Jul 26, 2026 |
| Hudson River Trading | Count 2x2 Submatrices by Black Cells | Coding |  | 🆕 Jul 26, 2026 |
| Hudson River Trading | Cumulative Unique Bytes | Coding |  | 🆕 Jul 26, 2026 |
| Upstart | Minimum Absolute Pair Difference | Coding |  | 🆕 Jul 26, 2026 |
| Upstart | Lexicographic Word Frequencies | Coding |  | 🆕 Jul 26, 2026 |
| Upstart | Sum Multiples of 3, 5, or 7 Below N | Coding |  | 🆕 Jul 26, 2026 |
| Upstart | Add Drama to Text Groups | Coding |  | 🆕 Jul 26, 2026 |
| DE Shaw | Maximum L1 Distance Between Equal-Length Subarrays | Coding |  | 🆕 Jul 26, 2026 |
| Airbnb | Nested List Iterator with Remove | Coding |  | 🆕 Jul 26, 2026 |
| Citadel | Limit Order Book Matching Engine | Coding |  | 🆕 Jul 26, 2026 |
| Hudson River Trading | Market Data Signal Watcher | Coding |  | 🆕 Jul 26, 2026 |
| Databricks | Rectangular K-in-a-Row | Coding |  | 🆕 Jul 26, 2026 |
| Amazon | Shortest Distance on a Circular Bus Route | Coding |  | 🆕 Jul 26, 2026 |
| Databricks | Design a Durable Local Event Writer | System design |  | 🆕 Jul 26, 2026 |
| Databricks | Design a Chat Application Cache Architecture | System design |  | 🆕 Jul 25, 2026 |
| Salesforce | Optimal Account Balancing | Coding |  | 🆕 Jul 25, 2026 |
| Google | Count Sortable Splits | Coding |  | 🆕 Jul 25, 2026 |
| Stripe | Rule-Driven Transaction Fraud Detection | Coding |  | 🆕 Jul 25, 2026 |
| OpenAI | Prefix Matrix Products and Autograd | Coding |  | 🆕 Jul 25, 2026 |
| Pinterest | Nested Set Structural Equivalence | Coding |  | 🆕 Jul 25, 2026 |
| Stripe | Design an Idempotent Ledger Service | System design |  | 🆕 Jul 25, 2026 |
| Amazon | Global Music Streaming Platform | System design |  | 🆕 Jul 25, 2026 |
| Amazon / Postman | Social News Feed With Live Engagement | System design |  | 🆕 Jul 25, 2026 |
| Amazon | Design File-System Search with Symlink Safety | Low-level design |  | 🆕 Jul 25, 2026 |
| TikTok | Bubble Explosion | Coding |  | 🆕 Jul 25, 2026 |
| TikTok | Reconstruct Landmark Journey | Coding |  | 🆕 Jul 25, 2026 |
| TikTok | Reverse the Interior of Vowel-Bounded Words | Coding |  | 🆕 Jul 25, 2026 |
| TikTok | Uppercase-Lowercase Difference | Coding |  | 🆕 Jul 25, 2026 |
| Salesforce | Longest Increasing Subsequence | Coding |  | 🆕 Jul 24, 2026 |
| Salesforce | Maximal Square | Coding |  | 🆕 Jul 24, 2026 |
| MathWorks | Beautiful Arrangement | Coding |  | 🆕 Jul 24, 2026 |
| MathWorks | Find Minimum Cost to Remove Array Elements | Coding |  | 🆕 Jul 24, 2026 |
| Apple | Design Task Manager | Coding |  | 🆕 Jul 24, 2026 |
| Apple | Unit Conversion II | Coding |  | 🆕 Jul 24, 2026 |
| Cresta | Feature Flag Evaluation Engine | Coding |  | 🆕 Jul 24, 2026 |
| MathWorks | Group Shifted Strings | Coding |  | 🆕 Jul 24, 2026 |
| MathWorks | Longest Valid Parentheses | Coding |  | 🆕 Jul 24, 2026 |
| LinkedIn | CI/CD Pipeline Orchestration System | System design |  | 🆕 Jul 24, 2026 |
| Tekion | Design a Car Service-Center Booking System | System design |  | 🆕 Jul 24, 2026 |
| MathWorks | Design a Product Authentication Platform | System design |  | 🆕 Jul 24, 2026 |
| Shopify | Design a Production-Ready URL Cache Service | System design |  | 🆕 Jul 24, 2026 |
| Harvey | Grounded Document-Vault Question Answering | System design |  | 🆕 Jul 24, 2026 |
| Google | Ranked Deals Discovery and Claim Service | System design |  | 🆕 Jul 24, 2026 |
| Tekion | Design a Configurable Logging Framework | Low-level design |  | 🆕 Jul 24, 2026 |
| Capillary Technologies | Design a Loyalty-Data Insight Platform | System design |  | 🆕 Jul 24, 2026 |
| Akuna | Profitable Project Pairs | Coding |  | 🆕 Jul 23, 2026 |
| Goldman Sachs | Validate Binary Search Tree | Coding |  | 🆕 Jul 23, 2026 |
| Visa | Maximum Server Processing Time | Coding |  | 🆕 Jul 23, 2026 |
| Visa | Signal Pings | Coding |  | 🆕 Jul 23, 2026 |
| Visa | Sum of Index-Ordered Pair Differences | Coding |  | 🆕 Jul 23, 2026 |
| OnePay | Design a Community Chat Platform | System design |  | 🆕 Jul 23, 2026 |
| Roblox | Design a Like/Unlike Service | System design |  | 🆕 Jul 23, 2026 |
| Cursor | Design a Versioned IDE Settings Sync System | System design |  | 🆕 Jul 23, 2026 |
| Bloomberg | Word Break II | Coding |  | 🆕 Jul 22, 2026 |
| IMC | Rock Jumping | Coding |  | 🆕 Jul 22, 2026 |
| IMC | Stack Batch Removal | Coding |  | 🆕 Jul 22, 2026 |
| Microsoft | Binary String Swap Time | Coding |  | 🆕 Jul 22, 2026 |
| Microsoft | Minimum Effort Task Schedule | Coding |  | 🆕 Jul 22, 2026 |
| Tekion | Longest Balanced Substring After One Swap | Coding |  | 🆕 Jul 22, 2026 |
| Amazon | Sort an Array with Rotate and Flip | Coding |  | 🆕 Jul 22, 2026 |
| Akuna | Calculate Portfolio Rebalancing Deltas | Coding |  | 🆕 Jul 22, 2026 |
| Akuna | Maximum Label Difference in a Connected Component | Coding |  | 🆕 Jul 22, 2026 |
| Akuna | Minimize Malware Spread by Removing a Node | Coding |  | 🆕 Jul 22, 2026 |
| Akuna | Sort Array by Frequency | Coding |  | 🆕 Jul 22, 2026 |
| TikTok | Count Access Code Pairs | Coding |  | 🆕 Jul 22, 2026 |
| TikTok | Count Key Changes | Coding |  | 🆕 Jul 22, 2026 |
| TikTok | Travel Distance on Scooters | Coding |  | 🆕 Jul 22, 2026 |
| TikTok | Validate 3x3 Digit Windows | Coding |  | 🆕 Jul 22, 2026 |
| Two Sigma | Online No-Intercept Linear Regression | Coding |  | 🆕 Jul 22, 2026 |
| Optiver | Overheat Prevention Controller | Coding |  | 🆕 Jul 22, 2026 |
| DRW | Last Round for Each Player | Coding |  | 🆕 Jul 22, 2026 |
| DRW | Shortest Compressed Length After Removal | Coding |  | 🆕 Jul 22, 2026 |
| Amazon | Design a Financial Portfolio Dashboard | System design |  | 🆕 Jul 22, 2026 |
| Databricks | Design a Chat Application with Message and Thread Deletion | System design |  | 🆕 Jul 22, 2026 |
| Amazon | Loyal Customers Across Two Days | Coding |  | 🆕 Jul 21, 2026 |
| Amazon | Smallest Number With a Given Digit Sum | Coding |  | 🆕 Jul 21, 2026 |
| Oracle | Merge k Sorted Lists | Coding |  | 🆕 Jul 21, 2026 |
| Amazon | Design a Distributed Recurring Workflow Scheduler | System design |  | 🆕 Jul 21, 2026 |
| Mercor | Design a Durable Work Orchestration Platform | System design |  | 🆕 Jul 21, 2026 |
| Amperity | Design a Read-Once Secret Sharing Service | System design |  | 🆕 Jul 21, 2026 |
| Amazon | Design Music Search, Playlists, and Playback | Low-level design |  | 🆕 Jul 21, 2026 |
| Snowflake / Amperity | Design a Unified SaaS Analytics Platform | System design |  | 🆕 Jul 21, 2026 |
| Airbnb | Most Frequent Reduced Digit | Coding |  | 🆕 Jul 20, 2026 |
| Airbnb | Rectangle Fit Queries | Coding |  | 🆕 Jul 20, 2026 |
| Airbnb | Robot Final Direction | Coding |  | 🆕 Jul 20, 2026 |
| Airbnb | Robot Inventory Tracking | Coding |  | 🆕 Jul 20, 2026 |
| Akuna | Communications Handler | Coding |  | 🆕 Jul 20, 2026 |
| Amazon | Basic Calculator | Coding |  | 🆕 Jul 20, 2026 |
| Amazon | Distance Between Two Tree Nodes | Coding |  | 🆕 Jul 20, 2026 |
| Walmart | Minimum Stress Path | Coding |  | 🆕 Jul 20, 2026 |
| Capital One | Format a Newspaper Page | Coding |  | 🆕 Jul 20, 2026 |
| Akuna | Maximum K-Star Sum | Coding |  | 🆕 Jul 20, 2026 |
| Microsoft | Maximum Pipeline Throughput | Coding |  | 🆕 Jul 20, 2026 |
| Microsoft | Maximum Strong Team Subarray | Coding |  | 🆕 Jul 20, 2026 |
| PhonePe | Luna and the Colorful Socks | Coding |  | 🆕 Jul 20, 2026 |
| Ramp | Design a Real-Time Payment Count Dashboard | System design |  | 🆕 Jul 20, 2026 |
| Meta | Design and Implement an In-Memory Tally Service | Low-level design |  | 🆕 Jul 20, 2026 |
| Assort Health | Design a Conversational Flight Search and Booking Agent | System design |  | 🆕 Jul 20, 2026 |
| Capital One | Alternate String Ends | Coding |  | 🆕 Jul 19, 2026 |
| Capital One | Sort Every Matrix Border Layer | Coding |  | 🆕 Jul 19, 2026 |
| Capital One | Round-Robin WDL Order | Coding |  | 🆕 Jul 19, 2026 |
| Waymo | Average or Zero | Coding |  | 🆕 Jul 19, 2026 |
| Visa | Minimum Score of a Path Between Cities | Coding |  | 🆕 Jul 18, 2026 |
| IDFC | Smallest Adjacent Concatenation | Coding |  | 🆕 Jul 18, 2026 |
| IDFC | Minimum Cake Cuts | Coding |  | 🆕 Jul 18, 2026 |
| Apple | Design a Large JSON Transformation Service | System design |  | 🆕 Jul 18, 2026 |
| Pinterest | Design a Real-Time Category Leaderboard | System design |  | 🆕 Jul 18, 2026 |
| Unattributed | Design Durable Long-Running Agentic Query Execution | System design |  | 🆕 Jul 18, 2026 |
| Unattributed | Design and Implement a Pluggable Notification Rate Limiter | Low-level design |  | 🆕 Jul 18, 2026 |
| Goldman Sachs | Inherited Role Permissions | Coding |  | 🆕 Jul 17, 2026 |
| Goldman Sachs | Root of the Largest Tree | Coding |  | 🆕 Jul 17, 2026 |
| Uber | Design a Driver Payout System | System design |  | 🆕 Jul 17, 2026 |
| Microsoft | Design a Real-Time Multiplayer Game | System design |  | 🆕 Jul 17, 2026 |
| Adobe | Design Infinite Scroll for Mutable Data | Low-level design |  | 🆕 Jul 17, 2026 |
| Adobe | Design Network-Backed Search Suggestions | Low-level design |  | 🆕 Jul 17, 2026 |
| Amazon | Customer Package Delivery Report | SQL |  | 🆕 Jul 16, 2026 |
| Microsoft | Alphabetically Smallest Palindrome | Coding |  | 🆕 Jul 16, 2026 |
| Microsoft | Maximum Reward Points | Coding |  | 🆕 Jul 16, 2026 |
| Zomato / Eternal | Robot Warehouse Optimization | Coding |  | 🆕 Jul 16, 2026 |
| Google | Count Good Numbers | Coding |  | 🆕 Jul 15, 2026 |
| Google | Count Element Symbol Decompositions | Coding |  | 🆕 Jul 15, 2026 |
| Google | Convert Snake Case to Camel Case | Coding |  | 🆕 Jul 15, 2026 |
| Uber | Last Truck to Leave the Lane | Coding |  | 🆕 Jul 15, 2026 |
| Akuna | Minimum Swaps | Coding |  | 🆕 Jul 15, 2026 |
| Citadel | Minimum Changes for a Periodic Palindrome | Coding |  | 🆕 Jul 15, 2026 |
| Citadel | Minimum Image Processing Cost | Coding |  | 🆕 Jul 15, 2026 |
| IBM | Count Strictly Increasing Subsequences of Length 3 | Coding |  | 🆕 Jul 15, 2026 |
| Goldman Sachs | Alternating Parity Permutations | Coding |  | 🆕 Jul 15, 2026 |
| Arcesium | Ordered Payload Release | Coding |  | 🆕 Jul 15, 2026 |
| ByteDance | Most Frequent Integer with Smaller Tie-Break | Coding |  | 🆕 Jul 15, 2026 |
| Zomato / Eternal / Amazon | Design an Online Ordering Platform | System design |  | 🆕 Jul 15, 2026 |
| Uber | Chain of Command | Coding |  | 🆕 Jul 14, 2026 |
| Waymo | Design a Global Small-Image Cache | System design |  | 🆕 Jul 14, 2026 |
| Waymo | Design a Matchmaking Service | System design |  | 🆕 Jul 14, 2026 |
| Salesforce | Design a Rental Car Reservation System | System design |  | 🆕 Jul 14, 2026 |
| Salesforce | Design a Third-Party SaaS Integration Platform | System design |  | 🆕 Jul 14, 2026 |
| New Relic | Product of Array Except Self | Coding |  | 🆕 Jul 13, 2026 |
| OpenAI | CIDR IPv4 Range Iterator | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | IPv4 Forward Iterator | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | IPv4 Reverse Iterator | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | Convert an IPv4 Range to Minimal CIDR Blocks | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | Toy Language Generic Return-Type Inference | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | Count Matching Regions in Two Binary Grids | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | Largest Square Subgrid Under a Sum Limit | Coding |  | 🆕 Jul 12, 2026 |
| OpenAI | Backpropagation Through Sort and Median | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Repair the Bootloader Program | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Normalize a DNS Domain Name | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Worker Management, Part 1: Office Registration | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Worker Management, Part 2: Top Workers | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Worker Management, Part 3: Promotions and Salary | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Worker Management, Part 4: Double-Paid Intervals | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Cloud Storage Compression and Decompression | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | In-Memory Database Historical Lookup | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Banking Pending Transfer Acceptance | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Cloud Storage File Versioning | Coding |  | 🆕 Jul 12, 2026 |
| Anthropic | Cloud Storage Prefix Trash and Restore | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Number of Islands II | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Course Schedule | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Maximum Length-K Window Sum over Sparse Segments | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Maximum Sum of Heights | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Longest Palindromic Subsequence | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Group Anagrams | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Maximal Square | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Sliding Window Maximum | Coding |  | 🆕 Jul 12, 2026 |
| Agoda | 3Sum | Coding |  | 🆕 Jul 12, 2026 |
| JP Morgan | Bitwise XOR Subsequences | Coding |  | 🆕 Jul 12, 2026 |
| Stripe | Deployment Window Scheduler | Coding |  | 🆕 Jul 12, 2026 |
| TikTok | Obstacle Placement Queries | Coding |  | 🆕 Jul 12, 2026 |
| Upstart | Coordinate Bounding Box | Coding |  | 🆕 Jul 12, 2026 |
| Upstart | Increase Exclamations and Convert Periods | Coding |  | 🆕 Jul 12, 2026 |
| Upstart | Interleave Equal-Length Strings by Column | Coding |  | 🆕 Jul 12, 2026 |
| Upstart | Scale Ingredient Quantities | Coding |  | 🆕 Jul 12, 2026 |
| IDFC | Find All People With Secret | Coding |  | 🆕 Jul 12, 2026 |
| Optiver | Power Cell Bank | Coding |  | 🆕 Jul 12, 2026 |
| DRW | Doctor Appointment Slot Assignment | Coding |  | 🆕 Jul 12, 2026 |
| DRW | Maximum Even-Sum Neighboring Pairs | Coding |  | 🆕 Jul 12, 2026 |
| DRW | Minimize Maximum Group Difference | Coding |  | 🆕 Jul 12, 2026 |
| Goldman Sachs | Cheapest Flights Within K Stops | Coding |  | 🆕 Jul 12, 2026 |
| Goldman Sachs | Word Ladder | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Delivery Cost Tracker | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Corporate Card Expense Rules | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Camel Cards | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Article Vote Tracker | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Employee Resource Access Management | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Limit an Organization Tree's Height | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Distributed System Recovery | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Server Upgrade Planning | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Shortest Substring | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Song Play Analytics | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Lexicographically Minimum Stack Encryption | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Minimum Account Settlements | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Matrix Region Sum | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Maximum XOR Elimination Score | Coding |  | 🆕 Jul 12, 2026 |
| Rippling | Prime Tree City Labelings | Coding |  | 🆕 Jul 12, 2026 |
| Zomato / Eternal | Jump Game IV | Coding |  | 🆕 Jul 12, 2026 |
| IndiaMART | Reverse a String | Coding |  | 🆕 Jul 12, 2026 |
| Moody's | Longest Subarray with At Most Two Distinct Values | Coding |  | 🆕 Jul 12, 2026 |
| MulticoreWare | Minimum Coin Change | Coding |  | 🆕 Jul 12, 2026 |
| MulticoreWare | Second Distinct Largest Element | Coding |  | 🆕 Jul 12, 2026 |
| Shipsy | Largest Rectangle in Histogram | Coding |  | 🆕 Jul 12, 2026 |
| Stryker | Squares of a Sorted Array | Coding |  | 🆕 Jul 12, 2026 |
| Hive | Validate a Directed Edge Addition | Coding |  | 🆕 Jul 12, 2026 |
| Robinhood | Word Frequency in a Large Text | Coding |  | 🆕 Jul 12, 2026 |
| Amazon | Repair recurring payments in the Wallet backend | AI coding |  | 🆕 Jul 12, 2026 |
| Target | Minimum Edit-Distance String for Each Query | Coding |  | Jul 11, 2026 |
| Target | Count Lucky Numbers in a Range | Coding |  | Jul 11, 2026 |
| Target | First-Available Seat Booking | Coding |  | Jul 11, 2026 |
| OpenAI | Memory Allocator | Coding |  | Jul 10, 2026 |
| OpenAI | Message Event Aggregation | Coding |  | Jul 10, 2026 |
| OpenAI | Streaming Entropy, Part 1: Batch Entropy | Coding |  | Jul 10, 2026 |
| OpenAI | Streaming Entropy, Part 2: Numerically Stable Entropy | Coding |  | Jul 10, 2026 |
| OpenAI | Streaming Entropy, Part 3: Block-wise Entropy | Coding |  | Jul 10, 2026 |
| OpenAI | Streaming Entropy, Part 4: Stable Streaming Entropy | Coding |  | Jul 10, 2026 |
| OpenAI | Versioned Social Network | Coding |  | Jul 10, 2026 |
| Anthropic | Banking System, Part 1: Accounts and Transfers | Coding |  | Jul 10, 2026 |
| Anthropic | Banking System, Part 2: Top Spenders | Coding |  | Jul 10, 2026 |
| Anthropic | Banking System, Part 3: Scheduled Payments | Coding |  | Jul 10, 2026 |
| Anthropic | Banking System, Part 4: Merging and Balance History | Coding |  | Jul 10, 2026 |
| Amazon | Number of Atoms | Coding |  | Jul 10, 2026 |
| Amazon | Minimum Redistribution Cost | Coding |  | Jul 10, 2026 |
| Amazon | Domain Weight Calculation | Coding |  | Jul 10, 2026 |
| Amazon | Minimum Contiguous Replacements | Coding |  | Jul 10, 2026 |
| Walmart | K-Capable Model Costs | Coding |  | Jul 10, 2026 |
| Google | Ad Rotation Scheduler With Cooldown | Coding |  | Jul 10, 2026 |
| Google | Consolidated On-Call Rotations | Coding |  | Jul 10, 2026 |
| Google | Count Connected Point Clusters | Coding |  | Jul 10, 2026 |
| Google | Longest Target Run After Replacements | Coding |  | Jul 10, 2026 |
| Hudson River Trading | Backtick Identifier Converter | Coding |  | Jul 10, 2026 |
| Stripe | Directly Linked Users | Coding |  | Jul 10, 2026 |
| Stripe | Fraud Ring Size | Coding |  | Jul 10, 2026 |
| Stripe | Risky Fraud Ring | Coding |  | Jul 10, 2026 |
| Two Sigma | Balanced Split String with Wildcards | Coding |  | Jul 10, 2026 |
| Two Sigma | Closest Color | Coding |  | Jul 10, 2026 |
| Visa | Planning Production | Coding |  | Jul 10, 2026 |
| Visa | Subarray Sum | Coding |  | Jul 10, 2026 |
| Optiver | Construct Binary Tree S-Expression | Coding |  | Jul 10, 2026 |
| TCS | Array Rank Transform | Coding |  | Jul 10, 2026 |
| Codeium | Biggest Connected Component | Coding |  | Jul 10, 2026 |
| IMC | Chain of Command | Coding |  | Jul 10, 2026 |
| IMC | Choose Containers | Coding |  | Jul 10, 2026 |
| Flexport | Choose the Next Hidden-Word Guess | Coding |  | Jul 10, 2026 |
| Apple | Phone Directory | Coding |  | Jul 10, 2026 |
| Okta | CD Rental System | Coding |  | Jul 10, 2026 |
| Omnissa | Longest Substring Without Repeating Characters | Coding |  | Jul 09, 2026 |
| Omnissa | Rotate Array Right | Coding |  | Jul 09, 2026 |
| Spotnana | All OOne Operations | Coding |  | Jul 09, 2026 |
| Rupeek | Trapping Rain Water | Coding |  | Jul 08, 2026 |
| OpenAI | DSA Round: Maximum Score Grid Path | Coding |  | Jul 08, 2026 |
| Anthropic | Cloud Storage System | Coding |  | Jul 08, 2026 |
| Amazon | Closest Version Date | Coding |  | Jul 08, 2026 |
| Amazon | Maximum Concurrent Processes (Bar Raiser Round) | Coding |  | Jul 08, 2026 |
| Amazon | Package Dependency Order | Coding |  | Jul 08, 2026 |
| Scale AI | Task Scheduler with Dependencies | Coding |  | Jul 08, 2026 |
| Salesforce | ATM Queue Exit Order | Coding |  | Jul 08, 2026 |
| Salesforce | Good Ways to Split an Array | Coding |  | Jul 08, 2026 |
| Salesforce | Generate Seen Binary Strings | Coding |  | Jul 08, 2026 |
| Salesforce | Update Pod Counts From Logs | Coding |  | Jul 08, 2026 |
| Agoda | Feasibility of Printing Within Given Days | Coding |  | Jul 08, 2026 |
| Agoda | Minimum Daily Printing Limit | Coding |  | Jul 08, 2026 |
| Nvidia | Fibonacci Iterator | Coding |  | Jul 08, 2026 |
| Google | String Pattern Replacement | Coding |  | Jul 08, 2026 |
| Google | Template Variable Expansion | Coding |  | Jul 08, 2026 |
| Meta | Highest Rating Price Ratio | Coding |  | Jul 08, 2026 |
| Snowflake | Closest Target Character | Coding |  | Jul 08, 2026 |
| Point72 | Test the Hypothesis | Coding |  | Jul 08, 2026 |
| DE Shaw | Minimum Frames for Equal Chunks | Coding |  | Jul 08, 2026 |
| DE Shaw | Non-Alternating Binary Partitions | Coding |  | Jul 08, 2026 |
| Sofi | Reachable Nodes in a Directed Graph | Coding |  | Jul 08, 2026 |
| Mercor | Top K With a Deterministically Noisy Comparator (MLE) | Coding |  | Jul 08, 2026 |
| Reddit | Reconstruct Billing Status | Coding |  | Jul 08, 2026 |
| Apple | Product Except Self With Zeros | Coding |  | Jul 08, 2026 |
| Apple | Subset Sum Possible | Coding |  | Jul 08, 2026 |
| Apple | Validate Completed Sudoku | Coding |  | Jul 08, 2026 |
| Figma | Rich Text Parser Part 3 (Depth Tokens) | Coding |  | Jul 08, 2026 |
| Zomato / Eternal | Flipping Matrix | Coding |  | Jul 08, 2026 |
| Zomato / Eternal | Special Keyboard | Coding |  | Jul 08, 2026 |
| NatWest | Remove Duplicate Characters | Coding |  | Jul 08, 2026 |
| NatWest | Sum Elements at Even Indices | Coding |  | Jul 08, 2026 |
| Safe Security | Maximum Subarray Sum | Coding |  | Jul 08, 2026 |
| Blinkit | Unique Supersequence Merge | Coding |  | Jul 08, 2026 |
| Amazon | Merge Sorted Array | Coding |  | Jul 07, 2026 |
| PhonePe | Count Bowl Subarrays | Coding |  | Jul 07, 2026 |
| PhonePe | Reconstruct Itinerary | Coding |  | Jul 07, 2026 |
| Superhuman | Design an Ephemeral Messaging Service | System design |  | Jul 06, 2026 |
| Amazon | Design an Online Code Compiler | System design |  | Jul 05, 2026 |
| Amazon | Permutation Sorter | Coding |  | Jul 03, 2026 |
| Amazon | Maximum Product New Rating | Coding |  | Jul 03, 2026 |
| Amazon | Maximum Final Value | Coding |  | Jul 03, 2026 |
| Amazon | Get Max Servers | Coding |  | Jul 03, 2026 |
| McKinsey | Predicting the S&P 500 Index | Coding |  | Jul 03, 2026 |
| QRT | Array Nullification | Coding |  | Jul 03, 2026 |
| QRT | Keep Them Apart | Coding |  | Jul 03, 2026 |
| Snowflake | Minimum Height | Coding |  | Jul 03, 2026 |
| IBM | Spam Text Classification | Coding |  | Jul 03, 2026 |
| IBM | Query Type Frequency Window | Coding |  | Jul 03, 2026 |
| IBM | Maximum Requests in a Time Window | Coding |  | Jul 03, 2026 |
| IBM | Minimum Number of Non-Empty Disjoint Segments | Coding |  | Jul 03, 2026 |
| Unknown Company | String Challenge: Run-Length Encoding | Coding |  | Jul 03, 2026 |
| Nvidia | Governed SQL Generation Chatbot | System design |  | Jul 02, 2026 |
| Nvidia | GPU Telemetry Collection and Analytics Platform | System design |  | Jul 02, 2026 |
| Baseten | Ingest and Structure Historical Pod Alerts | System design |  | Jul 02, 2026 |
| Amazon | Feasible Indices After Prefix/Suffix Reduction | Coding |  | Jun 30, 2026 |
| Amazon | Secure Maximum Deliveries | Coding |  | Jun 30, 2026 |
| Snowflake | Simple Array Rotation Game | Coding |  | Jun 30, 2026 |
| Microsoft | XOR Multiplication | Coding |  | Jun 30, 2026 |
| Microsoft | Neural Network Subnetwork Strength | Coding |  | Jun 30, 2026 |
| Amazon | Count Distinct Domino Colorings | Coding |  | Jun 29, 2026 |
| Amazon | Frequently Bought Together | Coding |  | Jun 29, 2026 |
| Amazon | Minimum Emergency Deliveries | Coding |  | Jun 29, 2026 |
| Amazon | Productive Worker Teams | Coding |  | Jun 29, 2026 |
| Amazon | Souvenir Shop Purchases | Coding |  | Jun 29, 2026 |
| McKinsey | Count Repeated Request IDs | Coding |  | Jun 29, 2026 |
| Salesforce | Final Pod Counts After Logs | Coding |  | Jun 29, 2026 |
| Salesforce | Minimum Removals to Balance Array | Coding |  | Jun 29, 2026 |
| Uber | Minimum Operations To Reduce To Zero | Coding |  | Jun 29, 2026 |
| Uber | Shopkeeper Final Price | Coding |  | Jun 29, 2026 |
| TikTok | Check Even-Position Monotonicity | Coding |  | Jun 29, 2026 |
| TikTok | Construct WDL String | Coding |  | Jun 29, 2026 |
| Two Sigma | Linear Interpolator | Coding |  | Jun 29, 2026 |
| IBM | Request Retry Count | Coding |  | Jun 29, 2026 |
| Microsoft | Maximum Escape Game Score | Coding |  | Jun 29, 2026 |
| Microsoft | Minimum Cost K-Capable Models | Coding |  | Jun 29, 2026 |
| Microsoft | Unique Difference Pattern | Coding |  | Jun 29, 2026 |
| Goldman Sachs | Valid Binary Prefix | Coding |  | Jun 29, 2026 |
| Expedia | Maximum Team Size | Coding |  | Jun 29, 2026 |
| SeekOut | Merge Intervals | Coding |  | Jun 27, 2026 |
| Amazon | Repair Workflow Issue and Sub-Issue Creation | AI coding |  | Jun 25, 2026 |
| Amazon | Repair Workflow Team Editing and Deletion | AI coding |  | Jun 25, 2026 |
| ByteDance | Test Task Management User Assignments | AI coding |  | Jun 25, 2026 |
| Amazon | Service Pipeline Stabilization Time | Coding |  | Jun 24, 2026 |
| Amazon | Find Minimum Groups | Coding |  | Jun 24, 2026 |
| Google | Maximum Coins With Moving Tokens | Coding |  | Jun 24, 2026 |
| Google | Maximum Elements With a Common Digit | Coding |  | Jun 24, 2026 |
| Snowflake | Drawing Edge | Coding |  | Jun 24, 2026 |
| Snowflake | Generating Login Codes | Coding |  | Jun 24, 2026 |
| Microsoft | Programmer Strings | Coding |  | Jun 24, 2026 |
| Microsoft | Minimum Round Trip Lengths | Coding |  | Jun 24, 2026 |
| HSBC | Find ID of Soldier | Coding |  | Jun 21, 2026 |
| HSBC | Find Most Frequently Purchased Products | Coding |  | Jun 21, 2026 |
| Amazon | Sort Bug Report Frequencies | Coding |  | Jun 19, 2026 |
| Amazon | Maximum Equal Parts for Prefixes | Coding |  | Jun 19, 2026 |
| Meesho | Efficient Deployments | Coding |  | Jun 18, 2026 |
| Google | Fountain Safety | Coding |  | Jun 17, 2026 |
| Walmart | K-Capable Model Selection | Coding |  | Jun 16, 2026 |
| Amazon | Design a Vending Machine Fleet | System design |  | Jun 15, 2026 |
| Mercor | Design an External Career Data Analytics Platform | System design |  | Jun 15, 2026 |
| Scale AI | Task Processor: Dependencies and Deadlines | Coding |  | Jun 14, 2026 |
| Shopify | Mars Rover Robot Controller | Coding |  | Jun 13, 2026 |
| Salesforce | Count Prime Strings | Coding |  | Jun 10, 2026 |
| Vanta | Implement uniq: Unique Lines | Coding |  | Jun 10, 2026 |
| Amazon | Select Least Resource Tasks | Coding |  | Jun 09, 2026 |
| Amazon | Get Smallest Base Segment | Coding |  | Jun 09, 2026 |
| Amazon | Count Promotional Periods | Coding |  | Jun 09, 2026 |
| Amazon | Get Minimum Amount | Coding |  | Jun 09, 2026 |
| Agoda | Minimum Absolute Difference Pairs | Coding |  | Jun 08, 2026 |
| Amazon | Design an E-commerce Recommendation Event Pipeline | System design |  | Jun 05, 2026 |
| Amazon | Find Minimum Cost | Coding |  | Jun 04, 2026 |
| JP Morgan | About Shipping | Coding |  | Jun 04, 2026 |
| Netflix | Topological Sort for Ads Tasks | Coding |  | Jun 04, 2026 |
| Google | Consolidate On-Call Rotations | Coding |  | Jun 02, 2026 |
| Uber | Jump Game with Prime-3 Steps | Coding |  | Jun 01, 2026 |
| Uber | Total Palindrome Substring Cost | Coding |  | Jun 01, 2026 |
| Capital One | Count Numbers with Even Number of Digits | Coding |  | May 31, 2026 |
| Capital One | Longest Same-Character Substring | Coding |  | May 31, 2026 |
| Capital One | Count House Segments After Destruction | Coding |  | May 31, 2026 |
| Capital One | Laser Robot Safe Path | Coding |  | May 31, 2026 |
| Amazon | Lowest Common Ancestor Implemented with Stack | Coding |  | May 30, 2026 |
| Amazon | Design an Amazon Locker System | System design |  | May 26, 2026 |
| Amazon | Find Max Total Amount | Coding |  | May 25, 2026 |
| Akuna | Maximum Difference | Coding |  | May 25, 2026 |
| Amazon | Product Category Group Sizes | Coding |  | May 23, 2026 |
| Uber | Tournament Rounds by Rank | Coding |  | May 23, 2026 |
| Uber | Earliest Time All Users Are Connected | Coding |  | May 23, 2026 |
| Meta | Merge Three Sorted Arrays | Coding |  | May 23, 2026 |
| Amazon / Postman | Design a Collaborative Document Editor | System design |  | May 22, 2026 |
| Amazon | Count Connected Components | Coding |  | May 21, 2026 |
| Postman | Design a Social Feed and Post Detail Experience | System design |  | May 21, 2026 |
| Google | Detonate Bombs with Chain Reactions | Coding |  | May 20, 2026 |
| Google | Evaluate a Nested Math Expression | Coding |  | May 20, 2026 |
| Guidewire | Minimum Boys Next to Girls | Coding |  | May 20, 2026 |
| Salesforce | Run-Length String Compression | Coding |  | May 19, 2026 |
| Salesforce | Time Needed to Rearrange a Binary String | Coding |  | May 19, 2026 |
| Infosys | Minimum Path Sum With Grid Switches | Coding |  | May 19, 2026 |
| Snowflake | Effective Role Privileges | Coding |  | May 19, 2026 |
| Pinterest | Assign Pins to the Shortest Column | Coding |  | May 18, 2026 |
| OpenAI | Grid Infection Spread Until Stable | Coding |  | May 16, 2026 |
| OpenAI | Grid Infection with Immune Cells Until Stable | Coding |  | May 16, 2026 |
| OpenAI | Chat Event Counts | Coding |  | May 13, 2026 |
| Amazon | Unique Pairs With Target Sum | Coding |  | May 13, 2026 |
| Uber | Convex Function Minimization | Coding |  | May 13, 2026 |
| Harvey | Spreadsheet Formula Evaluator | Coding |  | May 13, 2026 |
| Hudson River Trading | Integer to String Without Built-ins | Coding |  | May 13, 2026 |
| Waymo | Decode Repeated Groups | Coding |  | May 13, 2026 |
| Deloitte | Seventh Nearest Palindrome | Coding |  | May 12, 2026 |
| Lyft | Rotten Oranges / Grid Infection BFS | Coding |  | May 12, 2026 |
| Anduril | Design and Implement a Doubly Linked List | Low-level design |  | May 12, 2026 |
| Uber | Maximal Square Area | Coding |  | May 11, 2026 |
| Snowflake | Closest Bathroom / Desk on a Grid | Coding |  | May 11, 2026 |
| Snowflake | Minimum Index Distance Between Person and Cake | Coding |  | May 11, 2026 |
| Snowflake | Minimum Clicks Between Wiki Pages | Coding |  | May 11, 2026 |
| Airbnb | Print Sentences as Table | Coding |  | May 11, 2026 |
| Crusoe | Interval Usage with Non-Overlapping Overrides | Coding |  | May 11, 2026 |
| DoorDash | Maximize Total Profit by Assigning Chefs to Dishes | Coding |  | May 11, 2026 |
| Ericsson | Pascal's Triangle | Coding |  | May 11, 2026 |
| Ericsson | Top K Frequent Elements | Coding |  | May 11, 2026 |
| Geico | Implement an LRU Cache | Coding |  | May 11, 2026 |
| TikTok | Maximum Candies with At Most Two Types in a Line | Coding |  | May 11, 2026 |
| TikTok | LRU Cache with TTL Expiration | Coding |  | May 11, 2026 |
| Upstart | Bounding Box from Coordinates | Coding |  | May 11, 2026 |
| Upstart | Filter by Threshold and Return Name with Max Score | Coding |  | May 11, 2026 |
| Whatnot | User Journey Paths | Coding |  | May 11, 2026 |
| Anthropic | In-Memory Database with Backup and Restore | Coding |  | May 10, 2026 |
| Capital One | Queue Check-in Simulation with Capacity Limit | Coding |  | May 10, 2026 |
| Capital One | Dynamic Wall Building and Range Query | Coding |  | May 10, 2026 |
| Capital One | Cyclic Shift to Strictly Descending Array | Coding |  | May 10, 2026 |
| Stripe | Email Log Processing, Grouping, and Sorting | Coding |  | May 10, 2026 |
| Circle | Task Management System | Coding |  | May 10, 2026 |
| Circle | User Quota Scheduling with Expiring Assignments | Coding |  | May 10, 2026 |
| Point72 | Lexicographically Smallest String After Substring Operation | Coding |  | May 10, 2026 |
| Two Sigma | Piecewise Linear Interpolation and Extrapolation | Coding |  | May 10, 2026 |
| Intuit | Small Business Network: Degrees of Separation | Coding |  | May 08, 2026 |
| ByteDance | Design an Event Booking and Analytics Platform | System design |  | May 07, 2026 |
| OpenAI | ChatApp with Bots | Coding |  | May 05, 2026 |
| OpenAI | IP Address to CIDR Blocks | Coding |  | May 05, 2026 |
| Uber | First Unique IP Hitting the Server | Coding |  | May 05, 2026 |
| Roblox | Implement a Rate Limiter | Coding |  | May 05, 2026 |
| Roblox | Rate Limit by Multiple Request Fields | Coding |  | May 05, 2026 |
| Visa | Minimum Cost to Select People for Skill Quotas | Coding |  | May 05, 2026 |
| Roblox | Rate Limiter Sliding Window With Per-Entity Limits | Coding |  | May 04, 2026 |
| IDFC | Special Binary String | Coding |  | May 01, 2026 |
| Amazon | Feasible Indices After Reduction | Coding |  | Apr 30, 2026 |
| Netflix | Command Undo Data Structure | Coding |  | Apr 30, 2026 |
| Google | Shortest Path with Mandatory Waypoint | Coding |  | Apr 30, 2026 |
| Google | Minimum Cars for Rental Requests | Coding |  | Apr 30, 2026 |
| Uber | First Unique Log Entry | Coding |  | Apr 30, 2026 |
| Uber | Top-K Using a Priority Queue | Coding |  | Apr 30, 2026 |
| Stripe | Generate Available Time Slots | Coding |  | Apr 30, 2026 |
| Applied Intuition | KV Store with Nested Transactions | Coding |  | Apr 30, 2026 |
| Citadel | Minimum Path Sum to Target in Binary Tree | Coding |  | Apr 30, 2026 |
| Datadog | Log Ingestion and Query | Coding |  | Apr 30, 2026 |
| LinkedIn | Count Completed Trips | Coding |  | Apr 30, 2026 |
| Oscar Health | Members Lacking Provider Network Access | Coding |  | Apr 30, 2026 |
| Tesla | KV Store with Rollback | Coding |  | Apr 30, 2026 |
| Oura | Assign Server Numbers by Type | Coding |  | Apr 28, 2026 |
| Verkada | Find Valid IP Addresses | Coding |  | Apr 28, 2026 |
| Visa | Maximize Capped Contribution Sum | Coding |  | Apr 27, 2026 |
| Visa | Longest Selectable Non-Decreasing Subarray | Coding |  | Apr 27, 2026 |
| Databricks | Find First Anagram Index | Coding |  | Apr 27, 2026 |
| Gemini | Minimum Fence Painting Operations | Coding |  | Apr 27, 2026 |
| IBM | Count Power Products in Range | Coding |  | Apr 26, 2026 |
| IBM | Count Descending Subarrays | Coding |  | Apr 26, 2026 |
| Zoox | Design a Robotaxi Teleoperations Analytics Platform | System design |  | Apr 26, 2026 |
| Discord | Design a Video Call Analytics Platform | System design |  | Apr 26, 2026 |
| Amazon | Count Similar String Groups | Coding |  | Apr 25, 2026 |
| Uber | Balanced Prefix Sets in a Permutation | Coding |  | Apr 25, 2026 |
| Uber | Minimum Edge Reversals to Root a Tree | Coding |  | Apr 25, 2026 |
| Amazon | Design a Fastag Toll Payment System | System design |  | Apr 25, 2026 |
| Amazon | Create Array Generator Service | Coding |  | Apr 20, 2026 |
| Point72 | Initial Public Offering | Coding |  | Apr 19, 2026 |
| Amazon | Get Min Errors | Coding |  | Apr 16, 2026 |
| Amazon | Maximum Score With Non-Adjacent Values | Coding |  | Apr 14, 2026 |
| Amazon | Make Value Groups Contiguous | Coding |  | Apr 13, 2026 |
| Superhuman | Lost Messages | Coding |  | Apr 10, 2026 |
| Superhuman | Optimal Transfer | Coding |  | Apr 10, 2026 |
| Superhuman | Math Homework | Coding |  | Apr 10, 2026 |
| Amazon | Dynamic Kth Largest Queries | Coding |  | Apr 09, 2026 |
| Amazon | Longest Zero Sum Subarray | Coding |  | Apr 09, 2026 |
| Amazon | Maximize Minimum Machine Power | Coding |  | Apr 09, 2026 |
| Amazon | Minimum Stick Connection Cost | Coding |  | Apr 09, 2026 |
| Uber | Balanced Permutation Subarrays | Coding |  | Apr 09, 2026 |
| Uber | Maximum Comfortable Riders | Coding |  | Apr 09, 2026 |
| Uber | Palindrome Path Queries in a Tree | Coding |  | Apr 09, 2026 |
| Amazon | Maximize Protected City Population | Coding |  | Apr 06, 2026 |
| Amazon | Minimum Cost to Convert Products to Variant A | Coding |  | Apr 06, 2026 |
| Amazon | Minimum Preparation Time for Two Handlers | Coding |  | Apr 06, 2026 |
| Rubrik | Minimum Swaps To Binary Palindrome | Coding |  | Apr 04, 2026 |
| Zorvyn | Shortest Path With K Free Edges | Coding |  | Apr 04, 2026 |
| Cohere | Enterprise Research Assistant | System design |  | Apr 01, 2026 |
| Snowflake | String Formation (Also for AI/ML Software Engineer Intern :) | Coding |  | Mar 31, 2026 |
| Snowflake | Max Element Indexes After Rotations | Coding |  | Mar 31, 2026 |
| HackerRank | Check Permutation Divisible by Eight | Coding |  | Mar 31, 2026 |
| Microsoft | Maximum Data Transfer Time | Coding |  | Mar 28, 2026 |
| Amazon | Sum Max Plus Min After Decrement Operations | Coding |  | Mar 25, 2026 |
| Uber | Minimum Plate Collection Time | Coding |  | Mar 25, 2026 |
| Blackrock | Process Scheduling | Coding |  | Mar 25, 2026 |
| Amazon | Make Power Non Decreasing | Coding |  | Mar 24, 2026 |
| Amazon | Sort Error Codes by Frequency | Coding |  | Mar 24, 2026 |
| Optiver | Days Between | Coding |  | Mar 24, 2026 |
| Amazon | The Best Way To Pack | Coding |  | Mar 23, 2026 |
| DRW | Simplified Tetris Engine | Coding |  | Mar 23, 2026 |
| Headlands | Disaster Recovery | Coding |  | Mar 21, 2026 |
| Microsoft | Authentication System | Coding |  | Mar 21, 2026 |
| Microsoft | Visible Profiles Count | Coding |  | Mar 21, 2026 |
| Swiggy | First and Last Occurrence | Coding |  | Mar 20, 2026 |
| TCS | Gym Fees Calculator | Coding |  | Mar 20, 2026 |
| Two Sigma | Sewer Drainage Partition | Coding |  | Mar 18, 2026 |
| Salesforce | Key Teams in Tree | Coding |  | Mar 15, 2026 |
| Salesforce | System Energy Reduction | Coding |  | Mar 15, 2026 |
| Salesforce | Update Logs by Symmetric XOR | Coding |  | Mar 15, 2026 |
| Salesforce | Count Palindromic Concatenation Pairs | Coding |  | Mar 02, 2026 |
| Microsoft | Recover Corrupted Master Page | Coding |  | Feb 27, 2026 |
| Uber | Kth Greater Element Indexes | Coding |  | Feb 24, 2026 |
| Uber | Kth Largest Subarray Bitwise OR | Coding |  | Feb 24, 2026 |
| Uber | Minimum Spanning Tree Weight in a Complete Binary Graph | Coding |  | Feb 24, 2026 |
| Uber | Balanced Prefix Permutation | Coding |  | Feb 19, 2026 |
| Uber | Minimum Euclidean Plate Collection Time | Coding |  | Feb 19, 2026 |
| Infosys | Maximum Subarray Sum After Swaps | Coding |  | Feb 19, 2026 |
| Postman | Group Duplicate Files by Content | Coding |  | Feb 17, 2026 |
| Salesforce | Collect Opportunity Data in a Tree | Coding |  | Feb 06, 2026 |
| Salesforce | [Replace '?' to Avo | | | |