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Developing Gen AI - RAG Applications with LangChain

person icon MANAS DASGUPTA

4.6

Developing Gen AI - RAG Applications with LangChain

Develop powerful RAG Applications using Open AI GPT APIs, LangChain LLM Framework and Vector Databases

updated on icon Updated on Jun, 2025

language icon Language - English

person icon MANAS DASGUPTA

category icon Development ,Data Science,LangChain

Lectures -20

Resources -2

Duration -8 hours

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4.6

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Course Description

This course on developing RAG Applications using Open AI GPT APIs, LangChain LLM Framework and Vector Databases is intended to enable learners who want to build a solid conceptual and hand-on proficiency to be able to solve any RAG automation projects given to them. This course covers all the basics aspects of LLM and Frameworks like Agents, Tools, Chains, Retrievers, Output Parsers, Loaders and Splitters and so on in a very thorough manner with enough hands-on coding. It also takes a deep dive into concepts of Language Embeddings and Vector Databases to help you develop efficient semantic search and semantic similarity based RAG Applications. 

List of Projects Included:

  • SQL RAG: Convert Natural Language to SQL Statements and apply on your MySQL Database to extract desired Results.
  • RAG with Conversational Memory: Create a simple RAG Application with Conversational Memory.
  • CV Analysis: Load a CV document and extract JSON based key information from the document.
  • Conversational HR Chatbot: Create a comprehensive HR Chatbot that is able to respond with answers from a HR Policy and Procedure database loaded into a Vector DB, and retain conversational memory like ChatGPT. Build UI using Streamlit.
  • Structured Data Analysis: Load structured data into a Pandas Dataframe and use a Few-Shot ReAct Agent to perform complex analytics.
  • Invoice Data Extractor: Upload multiple Invoices and extract key information into a CSV format. Build UI using Streamlit. 

For each project, you will learn:

  • The Business Problem
  • What LLM and LangChain Components are used
  • Analyze outcomes
  • What are other similar use cases you can solve with a similar approach.


Goals

  • Fundamental of LLM Application Development

  • LLM Frameworks with LangChain

  • Using Open AI GPT API to develop RAG Applications

  • Engineering Optimized Prompts for your RAG Application

  • LangChain Loaders and Splitters

  • Using Chains and LCEL (LangChain Expression Language)

  • Using Retreivers, Agents and Tools

  • Conversational Memory

  • Multiple RAG Projects with various Source Types and Business Use

Prerequisites

  • Basic Python Language

  • No Data Science experience needed

Developing Gen AI - RAG Applications with LangChain

Curriculum

Check out the detailed breakdown of what’s inside the course

Introduction to LLM Concepts and RAG Application Development

4 Lectures
  • play icon Large Language Models and Their Capabilities 32:31 32:31
  • play icon Introduction to LangChain Framework 22:58 22:58
  • play icon Introduction to LLM Prompts 25:12 25:12
  • play icon Out First LLM App - simple ways of forming a Prompt and using it to Chain with a Model 20:36 20:36

Fundamental Concepts of LangChain

9 Lectures
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RAG Applications and Projects

7 Lectures
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Instructor Details

MANAS DASGUPTA

MANAS DASGUPTA

Hi there, I am Manas Dasgupta, from Bangalore, the Silicon Valley of India.

By qualification, I hold a Master's Degree (MSc) in AI from the Liverpool John Moores University (LJMU), UK.

My expertise area encompass Generative AI - RAG Application Development using Frameworks like LangChain and LlamaIndex, Machine Learning and Data Science / Predictive Analytics areas including various Supervised, Unsupervised, Deep Neural Networks, Clustering Techniques, etc. 

My research areas in Masters were Natural Language Processing (NLP) using Deep Learning Methods such as Siamese Networks, Encoder-Decoder techniques, various Language Embedding methods such as BERT, areas such as Supervised Learning on Semantic Similarity and so on.

I have > 20 Years of experience in the IT Development mostly in the Financial Services domain, developing products and solutions. I am also the Founder of Teksands where me and my team develop Gen AI rich applications in the Talent space.

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