I will ibuild an ai chatbot with langchain, rag and python

R
rajeshroy215
R
rajeshroy215
Rajesh Roy
ibuild an ai chatbot with langchain, rag and python
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ibuild an ai chatbot with langchain, rag and python

About this gig

Are you looking for a smart AI chatbot that 

actually knows YOUR business?


I will build you a custom AI chatbot using 

LangChain and Python that answers questions 

from your own documents, website, or database.


What you get:

  • LangChain powered chatbot
  • RAG pipeline with vector search
  • FastAPI backend
  • React chat interface (Standard & Premium)
  • Full source code with comments
  • Setup documentation


I have 3.5 years of experience building 

enterprise AI systems for companies on Azure. 

Your chatbot will be production-ready, clean, 

and fully documented.


Message me before ordering to discuss 

your requirements!

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Source control

  • Programming language

    • Python

  • Frontend framework

    • Angular
    • React.js

  • Backend framework

    • Django
    • FastAPI
    • Flask

Get to know Rajesh Roy

Rajesh Roy

Full Stack AI and Data Engineer LangChain, Azure, Databricks, FastAPI

  • FromIndia
  • Member sinceJun 2026
  • Avg. response time1 hour

  • Languages

    English, Bengali, Hindi
I am a Data Engineer and Full Stack developer with 3.5 years of experience building enterprise AI systems on Azure. I specialize in AI chatbots and RAG pipelines using LangChain, multi-agent systems with LangGraph on Azure AI Foundry, data pipelines on Azure Databricks with Delta Lake, and backend APIs with FastAPI and Python. I have built and shipped production AI systems for enterprise clients including a 4-agent automation pipeline and a personalized AI chatbot with hybrid vector search. I deliver clean, well-documented code with fast turnaround.

My Portfolio

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