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English
$
USD
I will develop backend rest API with java spring boot or python fastapi
SuatK
About this gig
Hi, I'm Suat a backend engineer specialized in Java Spring Boot APIs.
I build clean, production-ready REST APIs that your frontend or mobile team can integrate without headaches. Not throwaway code proper layering, validation, error handling and documentation.
What I deliver:
REST API with Spring Boot (or FastAPI if you prefer Python)
Database design and integration (PostgreSQL, MySQL, MongoDB)
JWT authentication and role-based authorization
Input validation, consistent error responses, logging
Swagger / OpenAPI documentation
Full source code with setup instructions
Also available: microservices architecture, Redis caching, Docker setup, unit and integration tests, third-party API integrations (payment, email, LLM APIs).
Background: Computer Science degree from Sabancı University. Worked as a backend engineer at a fintech company building Spring Boot microservices, and as a data science intern in Berlin.
How I work: I ask questions before writing code, send progress updates, and deliver on time. If something is unclear in your requirements, you'll hear from me not a surprise at delivery.
Message me before ordering with your requirements and I'll tell you exactly which package fits.
Get to know SuatK
SuatK
Software Engineer
- FromTurkey
- Member sinceAug 2026
Languages
Turkish, English, German
Backend and AI engineer with a Computer Science and Engineering degree from Sabancı University. I build production-grade APIs and services with Java/Spring Boot, Python/FastAPI and Node.js — backed by PostgreSQL, Redis and Docker. I also develop LLM-powered features such as RAG pipelines, chatbots and AI integrations, plus Unity/C# game prototypes. Previously worked as a backend engineer at a fintech company and as a data science intern in Berlin. I care about clean architecture, readable code and clear communication — you'll get regular updates, documented work and on-time delivery.
FAQ
Which package do I need?
If you have a small project with a handful of endpoints, Basic is enough. For a real product with authentication and documentation, go Standard. Premium is for a complete backend you'll actually deploy. Not sure? Message me with your requirements.
Can you work with my existing codebase?
Yes. Send me the repository and I'll review it before we agree on scope. I can add features, refactor, or fix bugs in an existing Spring Boot or FastAPI project.
Do I own the code?
Yes, full ownership and complete source code are included in every package.
Will you deploy it for me?
I provide Docker setup and deployment instructions in the Premium package. Actual deployment to your server or cloud account can be arranged as a custom offer.
What do you need from me to start?
A description of what the API should do, your preferred database, and any existing documentation or designs. The more detail, the fewer revisions we'll need.
