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$
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I will build a rag chatbot with langchain, pinecone and openai for your documents
Monirul Islam
Level 2
About this gig
Stop losing leads to unanswered questions. Get an AI chatbot that actually works in production not a fragile demo.
I'm a Python/Django developer with 6+ years of experience building real business software. For the past two years I've specialized in AI applications: custom chatbots, RAG (Retrieval-Augmented Generation) systems that answer questions from your documents, and full AI-powered web applications.
What makes my work different:
- You own everything. Full source code, deployed on your infrastructure, using your API keys. No monthly fees to me, no lock-in.
- Production-grade, not prototype. Proper error handling, rate limiting, conversation history, and clean handoff documentation.
- Real RAG expertise. Your chatbot answers from your PDFs, docs, website content, or database with citations instead of hallucinating.
My stack: Python, Django, FastAPI, Next.js/React, PostgreSQL, OpenAI & Claude APIs, LangChain, LlamaIndex, vector DBs (pgvector, Pinecone, Chroma).
Typical projects:
- Customer support chatbot trained on your knowledge base
- Document chatbot for internal team Q&A
- AI features added to your existing web app
- Full AI web application built from scratch
Get to know Monirul Islam
Monirul Islam
Full Stack Developer, Django, React, NextJS, AI and RAG Apps
Level 2
- FromBangladesh
- Member sinceJul 2021
- Avg. response time1 hour
- Last delivery6 days
Languages
English
I build custom web applications end to end - Django and PostgreSQL on the backend, React and Next.js on the frontend.
What I ship:
- SaaS platforms and MVPs
- ERP and admin dashboards, inventory and order tracking
- REST APIs and integrations (HubSpot, Salesforce, Stripe)
- AI chatbots and RAG systems grounded in your own documents
- OCR and LLM pipelines that turn invoices into structured data
Day job: double-entry accounting for a Swiss financial firm. Same rigour goes into the code.
154 orders, 118 clients, 4.8 stars over 6+ years. Tell me what's breaking and I'll say if I can help.
My Portfolio
FAQ
I'm not sure which package I need — can you help?
Absolutely. Message me with what you want to build and I'll recommend the right package (or a custom offer) within an hour.
Will I own the source code?
Yes. You get the complete source code and admin access on every package — you're never locked to me.
Which AI models do you use?
OpenAI (GPT) and Anthropic (Claude), depending on your needs and budget. I'll advise the best fit.
Do I have to pay for API usage separately?
Yes — the chatbot calls OpenAI/Anthropic per conversation, billed by them directly. I'll set it up on your own API key and help you estimate monthly cost.
Can you train the bot on my own documents/website?
Yes — that's the RAG (Standard) package. Send PDFs, docs, or your site, and the bot answers from your real content.
Do you offer ongoing maintenance?
Yes, I offer monthly maintenance and feature add-ons as a custom offer after delivery.
