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$
USD
I will build a rag chatbot API with langchain and fastapi
Awais
About this gig
Stop connecting chatbots. Start shipping real AI backends.
Most RAG projects are scripts dressed up as products, no auth, no real endpoints, nothing a frontend can actually connect to.
I build production-ready RAG APIs with FastAPI and LangChain. Clean architecture. Real security. Code that your team can maintain and scale.
WHAT YOU GET:
- FastAPI backend with JWT auth + refresh tokens
- Document upload PDF, DOCX, TXT support
- Vector storage pgvector or ChromaDB
- Configurable LLM switch between OpenAI, LLaMA, or any HuggingFace model via .env only
- REST API endpoints + full Swagger docs
- Docker-ready for immediate deployment
WHY THIS IS DIFFERENT:
- Not a chatbot UI, a real API your app connects to
- No vendor lock-in swap LLMs without touching code
- Same architecture I used in production systems
IDEAL FOR:
- SaaS founders adding AI features to their product
- Developers who need a RAG backend, not a demo
Message me before ordering, and I'll tell you exactly what fits your use case.
I respond within 1 hour.
Get to know Awais
Awais
I build production ready AI backend systems for scalable applications
- FromPakistan
- Member sinceJul 2022
- Avg. response time1 hour
- Last delivery1 year
Languages
English, Hindi, French, Spanish
Hi, I'm Awais, a Software Engineering graduate and backend engineer with 3+ years of professional programming experience.
I build production-ready AI backend systems using Python and FastAPI, with robust database integration, LLMs, and RAG pipelines.
I focus on reliable APIs and scalable solutions that solve real business problems. If you need intelligent, AI-powered backend services, I’m ready to help.
My Portfolio
FAQ
Do I need an OpenAI API key to use this?
Not necessarily. The LLM is fully configurable via .env — you can use OpenAI, or run a completely free open-source stack with Ollama and LLaMA locally. We'll discuss the best option for your use case before you order.
Will this API work with my existing frontend or mobile app?
Yes. You receive fully documented REST API endpoints (Swagger/OpenAPI) that connect to any frontend — React, Next.js, Flutter, or anything that makes HTTP requests. No frontend lock-in.
What exactly will I receive on delivery?
Complete FastAPI source code, Docker setup, Postman collection, Swagger docs, and a README with setup instructions. Your team can run, maintain, and extend it without me.
