I will build a rag ai chatbot trained on your data

H
hemanthawijegun
H
hemanthawijegun
Hemantha W
build a rag ai chatbot trained on your data
build a rag ai chatbot trained on your data
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build a rag ai chatbot trained on your databuild a rag ai chatbot trained on your databuild a rag ai chatbot trained on your databuild a rag ai chatbot trained on your data

About this gig

Want an AI chatbot that answers questions from YOUR documents, not random internet guesses?


I'm a Full-Stack Engineer and Tech Lead with 8+ years of experience. I've built AI platforms that processed 40M+ records for clients in the UK, Australia and the USA.


I'll build you a custom RAG (Retrieval-Augmented Generation) chatbot trained on your PDFs, Word files, website content or FAQs.


What you get:


  • Accurate answers based on your own data
  • Source citations so users can trust the answers
  • Clean chat UI or a widget for your website
  • OpenAI, Gemini or local LLM (Ollama) support
  • Secure, scalable code (Next.js, NestJS, PostgreSQL + pgvector)
  • Full source code ownership


Perfect for:


  • Customer support bots
  • HR and policy assistants
  • Internal knowledge bases
  • Product and documentation Q&A


Why work with me:


  • Production-grade code, not a no-code template
  • Clear communication and on-time delivery
  • Support after delivery


Please message me before ordering so we can confirm your requirements and pick the right package.


  • AI engine

    • ChatGPT
    • Claude
    • Gemini
    • Ollama

  • Tools & frameworks

    • LangChain
    • LangGraph
    • OpenAI Agents SDK

  • AI solution type

    • AI agent
    • AI chatbot
    • Rag system

  • Purpose

    • Research
    • Document processing
    • Data analysis
    • Reporting
    • HR & recruiting
    • Education
    • Healthcare

Get to know Hemantha W

Hemantha W

Senior Full Stack and AI Engineer

  • FromSri Lanka
  • Member sinceNov 2021

  • Languages

    English
Hi, I'm Hemantha, a Full-Stack Engineer and Tech Lead with 8+ years of experience building SaaS products for clients in the UK, Australia, Sri Lanka and the USA. I build fast, scalable web apps with React, Next.js, Node.js and NestJS, deployed on AWS. I also build AI features: RAG chatbots, LLM integrations with OpenAI, and AI-powered data processing (one of my platforms has analysed 40M+ reviews). Clean code, clear communication and on-time delivery. Message me before ordering so we can scope your project.

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