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$
USD
I will build a fastapi backend api with python and postgresql
Showmik Debnath
About this gig
Are you looking for a reliable, well-structured backend for your web app or product? I specialize in building fast, secure, and scalable APIs using FastAPI and PostgreSQL.
What I offer:
- Custom REST API development with FastAPI
- Database design and integration with PostgreSQL
- User authentication and authorization
- Clean, well-documented, production-ready code
- Swagger/OpenAPI documentation included
- Bug fixes and improvements to existing FastAPI backends
I've built and deployed real projects including a full e-commerce backend (FastAPI + PostgreSQL) and a full-stack web application, so I understand what it takes to ship working, reliable code not just tutorials.
Why work with me:
- Clear communication throughout the project
- Clean code with comments so you (or your team) can maintain it easily
- Honest timelines. I won't promise something I can't deliver
Have a project in mind? Message me before ordering so we can confirm scope and make sure I'm the right fit for your needs.
Get to know Showmik Debnath
Showmik Debnath
FastAPI Backend Developer and AI Chatbot Specialist
- FromBangladesh
- Member sinceSep 2026
Languages
Bengali, English, Hindi
I'm a backend and AI engineer specializing in FastAPI, PostgreSQL, and LLM-powered applications. I build production-ready APIs, integrate large language models (Groq/LLaMA, LangChain) into real products, and create RAG-based systems that let apps answer questions from custom data. Recent work includes a full e-commerce backend, a full-stack grammar-checking web app, and multiple RAG/LLM experiments. I hold a CSE degree and have a published IEEE paper on machine learning. I care about clean, working code and clear communication — you'll know exactly where your project stands at every step.
FAQ
Do you provide the source code?
Yes, full source code is included with every package, so you have complete ownership and can modify or extend it later.
Can you work with my existing codebase instead of starting from scratch?
Yes, I can review, debug, or extend an existing FastAPI project. Message me with details first so I can give you an accurate scope and price.
Do you also handle frontend development?
My core focus is backend (FastAPI/PostgreSQL). For simple frontend needs (basic HTML/CSS/JS), I can include that; just message me first. For complex frontend (React, Vue, etc.), I recommend pairing me with a frontend specialist; I'll build the API to connect cleanly either way.
What do you need from me to get started?
A clear description of what the API/backend should do, any specific database structure you have in mind, and any existing code (if applicable).
Will I get support after delivery?
Yes, minor clarifications and bug fixes related to the delivered work are included. Larger changes or new features would be a separate order or extra.
