decodingai-magazine/llm-twin-course

🤖 𝗟𝗲𝗮𝗿𝗻 for 𝗳𝗿𝗲𝗲 how to 𝗯𝘂𝗶𝗹𝗱 an end-to-end 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗟𝗟𝗠 & 𝗥𝗔𝗚 𝘀𝘆𝘀𝘁𝗲𝗺 using 𝗟𝗟𝗠𝗢𝗽𝘀 best practices: ~ 𝘴𝘰𝘶𝘳𝘤𝘦 𝘤𝘰𝘥𝘦 + 12 𝘩𝘢𝘯𝘥𝘴-𝘰𝘯 𝘭𝘦𝘴𝘴𝘰𝘯𝘴

Python

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updated Apr 20, 2026

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README

LLM Twin Course: Building Your Production-Ready AI Replica

Learn to architect and implement a production-ready LLM & RAG system by building your LLM Twin

From data gathering to productionizing LLMs using LLMOps good practices.

by Decoding AI

🎯 What you'll learn

By finishing the "LLM Twin: Building Your Production-Ready AI Replica" free course, you will learn how to design, train, and deploy a production-ready LLM twin of yourself powered by LLMs, vector DBs, and LLMOps good practices.

No more isolated scripts or Notebooks! Learn production ML by building and deploying an end-to-end production-grade LLM system.

📖 About this course

You will learn how to architect and build a real-world LLM system from start to finish - from data collection to deployment.

You will also learn to leverage MLOps best practices, such as experiment trackers, model registries, prompt monitoring, and versioning.

The end goal? Build and deploy your own LLM twin.

What is an LLM Twin? It is an AI character that learns to write like somebody by incorporating its style and personality into an LLM.

🪈 The architecture of the LLM Twin is split into 4 Python microservices

The data collection pipeline

Crawl your digital data from various social media platforms, such as Medium, Substack and GitHub.

Clean, normalize and load the data to a Mongo NoSQL DB through a series of ETL pipelines.
Send database changes to a RabbitMQ queue using the CDC pattern.
Learn to package the crawlers as AWS Lambda functions.

The feature pipeline

Consume messages in real-time from a queue through a Bytewax streaming pipeline.
Every message will be cleaned, chunked, embedded and loaded into a Qdrant vector DB.
In the bonus series, we refactor the cleaning, chunking, and embedding logic using Superlinked, a specialized vector compute engine. We will also load and index the vectors to a Redis vector DB.

The training pipeline

Create a custom instruction dataset based on your custom digital data to do SFT.
Fine-tune an LLM using LoRA or QLoRA.
Use Comet ML's experiment tracker to monitor the experiments.
Evaluate the LLM using Opik
Save and version the best model to the Hugging Face model registry.
Run and automate the training pipeline using AWS SageMaker.

The inference pipeline

Load the fine-tuned LLM from the Hugging Face model registry.
Deploy the LLM as a scalable REST API using AWS SageMaker inference endpoints.
Enhance the prompts using advanced RAG techniques.
Monitor the prompts and LLM generated results using Opik
In the bonus series, we refactor the advanced RAG layer to write more optimal queries using Superlinked.
Wrap up everything with a Gradio UI (as seen below) where you can start playing around with the LLM Twin to generate content that follows your writing style.

Gradio UI

Along the 4 microservices, you will learn to integrate 4 serverless tools:

Comet ML as your experiment tracker and data registry;
Qdrant as your vector DB;
AWS SageMaker as your ML infrastructure;
Opik as your prompt evaluation and monitoring tool.

📬 Stay Updated

Join Decoding ML for proven content on designing, coding, and deploying production-grade AI systems with software engineering and MLOps best practices to help you ship AI applications. Every week, straight to your inbox.

👥 Who should join?

This course is ideal for:

ML/AI engineers who want to learn to engineer production-ready LLM & RAG systems using LLMOps good principles
Data Engineers, Data Scientists, and Software Engineers wanting to understand the engineering behind LLM & RAG systems

Note: This course focuses on engineering practices and end-to-end system implementation rather than theoretical model optimization or research.

🎓 Prerequisites

Category	Requirements
Skills	Basic understanding of Python and Machine Learning
Hardware	Any modern laptop/workstation will do the job, as the LLM fine-tuning and inference will be done on AWS SageMaker.
Level	Intermediate

💰 Cost structure

All tools used throughout the course will stick to their free tier, except:

OpenAI's API, which will cost ~$1
AWS for fine-tuning and inference, which will cost < $10 depending on how much you play around with our scripts and your region.

🥂 Open-source course: Participation is open and Free

As an open-source course, you don't have to enroll. Everything is self-paced, free of charge and with its resources freely accessible as follows:

code: this GitHub repository
articles: Decoding ML

📚 How will you learn?

The course contains 10 hands-on written lessons and the open-source code you can access on GitHub, showing how to build an end-to-end LLM system.

Also, it includes 2 bonus lessons on how to improve the RAG system.

You can read everything at your own pace.

Lessons

This self-paced course consists of 12 comprehensive lessons covering theory, system design, and hands-on implementation.

Our recommendation for each module:

Read the article
Run the code to replicate our results
Go deeper into the code by reading the src Python modules

[!NOTE] Check the INSTALL_AND_USAGE doc for a step-by-step installation and usage guide.

Lesson	Article	Category	Description	Source Code
1	An End-to-End Framework for Production-Ready LLM Systems	System Design	Learn the overall architecture and design principles of production LLM systems.	No code
2	Data Crawling	Data Engineering	Learn to crawl and process social media content for LLM training.	`src/data_crawling`
3	CDC Magic	Data Engineering	Learn to implement Change Data Capture (CDC) for syncing two data sources.	`src/data_cdc`
4	Feature Streaming Pipelines	Feature Pipeline	Build real-time streaming pipelines for LLM and RAG data processing.	`src/feature_pipeline`
5	Advanced RAG Algorithms	Feature Pipeline	Implement advanced RAG techniques for better retrieval.	`src/feature_pipeline`
6	Generate Fine-Tuning Instruct Datasets	Training Pipeline	Create custom instruct datasets for LLM fine-tuning.	`src/feature_pipeline/generate_dataset`
7	LLM Fine-tuning Pipeline	Training Pipeline	Build an end-to-end LLM fine-tuning pipeline and deploy it to AWS SageMaker.	`src/training_pipeline`
8	LLM & RAG Evaluation	Training Pipeline	Learn to evaluate LLM and RAG system performance.	`src/inference_pipeline/evaluation`
9	Implement and Deploy the RAG Inference Pipeline	Inference Pipeline	Design, implement and deploy the RAG inference to AWS SageMaker.	`src/inference_pipeline`
10	Prompt Monitoring	Inference Pipeline	Build the prompt monitoring and production evaluation pipeline.	`src/inference_pipeline`
11	Refactor the RAG module using 74.3% Less Code	Bonus on RAG	Optimize the RAG system.	`src/bonus_superlinked_rag`
12	Multi-Index RAG Apps	Bonus on RAG	Build advanced multi-index RAG apps.	`src/bonus_superlinked_rag`

📬 Stay Updated

🏗️ Project Structure

At Decoding ML we teach how to build production ML systems, thus the course follows the structure of a real-world Python project:

llm-twin-course/
├── src/                     # Source code for all the ML pipelines and services
│ ├── data_crawling/         # Data collection pipeline code
│ ├── data_cdc/              # Change Data Capture (CDC) pipeline code
│ ├── feature_pipeline/      # Feature engineering pipeline code
│ ├── training_pipeline/     # Training pipeline code
│ ├── inference_pipeline/    # Inference service code
│ └── bonus_superlinked_rag/ # Bonus RAG optimization code
├── .env.example             # Example environment variables template
├── Makefile                 # Commands to build and run the project
├── pyproject.toml           # Project dependencies

🚀 Install & Usage

To understand how to install and run the LLM Twin code end-to-end, go to the INSTALL_AND_USAGE dedicated document.

[!NOTE] Even though you can run everything solely using the INSTALL_AND_USAGE dedicated document, we recommend that you read the articles to understand the LLM Twin system and design choices fully.

💡 Questions and troubleshooting

Have questions or running into issues? We're here to help!

Open a GitHub issue for:

Questions about the course material
Technical troubleshooting
Clarification on concepts

🥂 Contributing

As an open-source course, we may not be able to fix all the bugs that arise.

If you find any bugs and know how to fix them, support future readers by contributing to this course with your bug fix.

We will deeply appreciate your support for the AI community and future readers 🤗

Contributors

A big "Thank you 🙏" to all our contributors! This course is possible only because of their efforts.

Next steps

Our LLM Engineer’s Handbook inspired the open-source LLM Twin course.

Consider supporting our work by getting our book to learn a complete framework for building and deploying production LLM & RAG systems — from data to deployment.

Perfect for practitioners who want both theory and hands-on expertise by connecting the dots between DE, research, MLE and MLOps:

Buy the LLM Engineer’s Handbook

License

This course is an open-source project released under the MIT license. Thus, as long you distribute our LICENSE and acknowledge our work, you can safely clone or fork this project and use it as a source of inspiration for whatever you want (e.g., university projects, college degree projects, personal projects, etc.).

📬 Stay Updated

aws

bytewax

comet-ml

course

docker

generative-ai

infrastructure-as-code

large-language-models

llmops

machine-learning-engineering

mlops

ml-system-design

pulumi

qdrant

qwak

rag

superlinked

Significant stargazers

Julien Denize

68 followers · starred Apr 2024

Michael Han

631 followers · starred Nov 2024

Guangdong Liu

102 followers · starred Jul 2024

Siyuan Zhang

43 followers · starred Dec 2024

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decodingai-magazine/llm-twin-course

Python

4,391

330 commits

updated Apr 20, 2026

See the code

README

LLM Twin Course: Building Your Production-Ready AI Replica

Learn to architect and implement a production-ready LLM & RAG system by building your LLM Twin

From data gathering to productionizing LLMs using LLMOps good practices.

by Decoding AI

🎯 What you'll learn

No more isolated scripts or Notebooks! Learn production ML by building and deploying an end-to-end production-grade LLM system.

📖 About this course

You will learn how to architect and build a real-world LLM system from start to finish - from data collection to deployment.

You will also learn to leverage MLOps best practices, such as experiment trackers, model registries, prompt monitoring, and versioning.

The end goal? Build and deploy your own LLM twin.

What is an LLM Twin? It is an AI character that learns to write like somebody by incorporating its style and personality into an LLM.