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UdemyIT & SoftwarePaid courseIntermediate levelCertificate

Advanced LangChain Techniques: Mastering RAG Applications (Udemy.com)

Elevate Your RAG Applications to the Next Level

Created by: Markus Lang

Last updated January 2026

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What you will learn

  • Learn LangChain Expression Language (LCEL)
  • Master advanced RAG techniques using the LangChain framework
  • Evaluate RAG pipelines using the RAGAS framework
  • Apply NeMo Guardrails for safe and reliable AI interactions

How it compares

Against the other 1,182 rated Udemy courses in IT & Software on CourseDuck:

  • Rating4.3 out of 5higher than 20% of them
  • Reviews339#681 of 1,183 by number of reviews
  • Length3.7 hoursshorter than 64% of them
  • Last updatedJanuary 2026more recently than 62% of them

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Course Description

What to Expect from This Course

Welcome to our course on Advanced Retrieval-Augmented Generation (RAG) with the LangChain Framework!

In this course, we dive into advanced techniques for Retrieval-Augmented Generation, leveraging the powerful LangChain framework to enhance your AI-powered language tasks. LangChain is an open-source tool that connects large language models (LLMs) with other components, making it an essential resource for developers and data scientists working with AI.

Course Highlights

Focus on RAG Techniques: This course provides a deep understanding of Retrieval-Augmented Generation, guiding you through the intricacies of the LangChain framework. We cover a range of topics from basic concepts to advanced implementations, ensuring you gain comprehensive knowledge.

Comprehensive Content: The course is designed for developers, software engineers, and data scientists with some experience in the world of LLMs and LangChain. Throughout the course, you'll explore:

  • LCEL Deepdive and Runnables

  • Chat with History

  • Indexing API

  • RAG Evaluation Tools

  • Advanced Chunking Techniques

  • Other Embedding Models

  • Query Formulation and Retrieval

  • Cross-Encoder Reranking

  • Routing

  • Agents

  • Tool Calling

  • NeMo Guardrails

  • Langfuse Integration

Additional Resources

  • Helper Scripts: Scripts for data ingestion, inspection, and cleanup to streamline your workflow.

  • Full-Stack App and Docker: A comprehensive chatbot application with a React frontend and FastAPI backend, complete with Docker support for easy setup and deployment.

  • Additional resources are available to support your learning.

Happy Learning! :-)

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Instructor Details

Markus Lang

English

Hello, I'm Markus, a software developer specializing in Artificial Intelligence and Python. I work in the finance industry and have extensive experience developing LLM applications with LangChain and successfully deploying them into production.

I am passionate about teaching and strive to make complex topics approachable and practical for my students, focusing on providing clear, hands-on learning experiences.

I’m excited to share my knowledge with you and help you grow your skills.

I look forward to welcoming you to my courses and being part of your learning journey!


German

Hallo, ich bin Markus, ein Softwareentwickler im Bereich Künstliche Intelligenz mit Spezialisierung auf Python. Ich arbeite in der Finanzbranche und habe umfangreiche Erfahrung darin, LLM-Applikationen mit LangChain zu entwickeln und erfolgreich in Produktion zu bringen.

Ich bin leidenschaftlich daran interessiert, komplexe Themen zu vermitteln, und lege großen Wert darauf, sie verständlich und praxisnah für meine Teilnehmenden zu gestalten.

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Reviews

4.3

339 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Kuldeep on 1/18/2026

This is a very good course on Advanced RAG, especially because it is highly hands-on. The practical approach really helped me build a deep understanding of how RAG systems work under the hood, rather than just using high-level abstractions.

By Oscar A Rangel on 10/7/2025

There are some techniques, but the problem I see is that he does not build the next notebook on the advantages of the previous one... and in the end, there is no best notebook that incorporates all the best advanced techniques using RAG.

By Alkiviadis Tzaras on 3/4/2025

Great course once again from Markus. The concepts taught are relevant. Maybe some parts of the code need small updates to keep up with the changing langchain syntax but it is till ok. One thing that would really elevate the course even more would be some exercises that would force you to apply different concepts along the way.

By Sharan Shyamsundar on 2/20/2025

Overall good course. Explanations and tutorials were good. But somethings need to be updated.

By Anonymized User on 11/29/2024

Could be better. Difficult to understand when jumping to code like that. Need overall, need visual materials like graph, chart, ...

By Anonymized User on 11/21/2024

Keeps up to the promise of the term Advanced in the course title. Gives a comprehensive overview on all the topics but the onus is still on the user to deep dive on the concepts. Recommend it. Would also like to give his Azure course a try!

By Craig West on 10/15/2024

Fantastic! Only half way through and learnt so much about RAG in a clear and logical way. It may seem a short course of 3.5 hours but the examples are very extendable. If you want a course on advanced RAG that is concise, deep and well explained then this is the course - and I am only half way through!

By Manuel Romero on 8/23/2024

Very comprehensive, in depth and updated, also includes a real life built project to analyze and build up your own project and consolidate learning The Python environment works perfectly (in mycase, Windows and Powershell) and demos are not very expensive in openai The syllabus is totally focused en RAG applications in production Congrats to the teacher!

By Matheus Kao on 8/12/2024

By far the most completed and updated course on Udemy about LangChain. I literally watched 5 other courses and this was the best. All concepts covered in depth, explanation about Runnables (the only course that I saw talking about it) Really appreciate your work on sharing this level of expertise and the end- to- end project. Please make a course about LangGraph. I'm already using it, and will be amazing checking out.

By Rory Cawley on 7/14/2024

This course information was clearly presented, Markus has taken this very fluid and rapidly evolving niche to provide practical proven techniques that will be a HUGE time saving for anyone building LLM applications. I feel lucky to have benefited from his deep hard fought knowledge.

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Overall Score : 86 / 100