Python Backend Developer for Hire

About

Looking for a Python backend developer who writes clean, production-ready code? I am Kirill Strelnikov, a freelance backend engineer based in Barcelona with 15+ commercial projects under my belt. I build REST APIs, design database architectures, integrate third-party services, and deploy scalable systems. My primary stack is Python and Django, but I also work with FastAPI for high-performance async services.

What I Build

• REST API development (Django REST Framework)
• Database architecture (PostgreSQL, Redis)
• Third-party API integrations
• Background processing (Celery, Redis)
• AI and ML integrations (OpenAI, LangChain)
• Docker containerization and CI/CD
• Performance optimization and code audits

My tech stack: Python, Django, Django REST Framework, PostgreSQL, Redis, Celery, Docker, OpenAI API, LangChain, Telegram Bot API, Stripe, FastAPI, Nginx, Git, Linux.

How I Work

1. Technical deep-dive — We review your existing system, API requirements, and performance targets. I identify bottlenecks and propose an architecture.

2. Database-first design — I start with the data model — schema, indexes, query patterns — because backend performance lives in the database layer.

3. API-first development — I build and document endpoints iteratively. Your frontend team or mobile devs can integrate against a staging API from week one.

4. Production hardening — Load testing, error handling, logging, monitoring. I deploy with Docker and set up CI/CD so you ship with confidence.

Learn more: Backend Development Services

Why Work With Me

• Backend-focused — I don’t spread thin across frontend, mobile, and backend. Python backend is all I do.
• 15+ production APIs — Django REST Framework, FastAPI, PostgreSQL. Battle-tested under real traffic.
• Performance-conscious — query optimization, caching strategies, async processing. I build systems that scale.
• Clean handover — documented APIs (OpenAPI/Swagger), typed code, and a Git repo your team can maintain.
• Fixed pricing — API projects from €2,000. You get a detailed scope and cost before any work starts.