I will build ai chatbot, rag chatbot, and full stack llm app

J
jahid_hasan227
J
jahid_hasan227
Jahid Hasan
build ai chatbot, rag chatbot, and full stack llm app
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build ai chatbot, rag chatbot, and full stack llm app
Full Screen
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build ai chatbot, rag chatbot, and full stack llm appbuild ai chatbot, rag chatbot, and full stack llm appbuild ai chatbot, rag chatbot, and full stack llm app

About this gig

Are you looking for a custom AI chatbot, RAG chatbot, or full stack LLM application for your business?


I can help you build a modern AI-powered web application using OpenAI API, ChatGPT, LangChain, vector database, Next.js, Node.js, NestJS, MongoDB, PostgreSQL, or Supabase.


I can build:

  • AI chatbot for website or SaaS platform
  • RAG chatbot using your PDF, documents, website, or custom data
  • Full stack LLM web app
  • ChatGPT API integration
  • AI customer support chatbot
  • Document-based question-answering system
  • Admin dashboard for managing chatbot data
  • Authentication, database, API, and deployment


What you will get:

  • Clean and scalable code
  • Responsive modern UI
  • Secure backend API
  • Database integration
  • AI response handling
  • Source code
  • Deployment support


Why choose me?

I am a full stack developer experienced with React, Next.js, Node.js, NestJS, MongoDB, PostgreSQL, Supabase, and modern AI integrations. I will focus on building a real working product, not just a basic demo.

Please message me before placing an order so we can discuss your project requirements.

  • Application Type

    • Web Application

  • Desktop Frameworks

    • Electron
    • React Native for Web

  • AI Type

    • Chat
    • Shopping
    • Education
    • Social Networking
    • Entertainment
    • Dating
    • Maps & Navigation
    • Travel
    • Streaming
    • E-commerce

  • Programming Language

    • JavaScript
    • Python
    • TypeScript
    • React
    • PyTorch

  • Web Frameworks

    • React
    • Angular
    • Express.js (Node.js)
    • Next.js

  • No & Low-Code Builders

    • Bubble
    • Lovable
    • FlutterFlow

Get to know Jahid Hasan

Jahid Hasan

Full Stack AI Developer React NestJS LangChain OpenAI

  • FromBangladesh
  • Member sinceApr 2026
  • Avg. response time1 hour

  • Languages

    English
Hi, I’m a full-stack software engineer with 5+ years of experience building web, mobile, SaaS, microservices, and AI-powered solutions. I help startups, agencies, and businesses turn ideas into clean, scalable, production-ready software. My expertise includes: • React, Next.js, Angular • Node.js, NestJS, Python APIs • Microservices architecture • React Native mobile apps • OpenAI, LangChain, RAG, AI agents • AWS, Docker, CI/CD • PostgreSQL, MongoDB, Redis Why work with me? • 30+ projects delivered • Clean, maintainable code • Clear communication • Scalable architecture • Long-term support

My Portfolio

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