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I will develop java spring boot restful api backend and microservices
Yusuf K
About this gig
Hi, I'm Yusuf. I build backends: RESTful APIs and microservices in Java and Spring Boot, backed by PostgreSQL. If you have a frontend, a mobile app or an idea that needs a server behind it, I can build it.
WHAT YOU GET
A working REST API with clean, documented endpoints
PostgreSQL database design and migrations
JWT authentication and role-based access with Spring Security
Input validation and clear error responses
Automated tests so changes don't break what already works
A microservice-ready structure if you plan to split it later
Docker setup and deployment to Render, Railway or your own server
Full source code, yours to keep
WHY ME
I have built and deployed an error tracking platform, a real-time chat backend over WebSocket, and a multi-tenant SaaS - all with Spring Boot and PostgreSQL. I care about the parts people skip: rate limiting, IDOR protection, race conditions, and tests that actually fail when something breaks.
HOW IT WORKS
Send me your endpoints or just your idea. I tell you honestly what fits in which package, then build it and show you working code before you pay the final amount.
Not sure what you need? Message me and I'll help you scope it - no obligation.
Get to know Yusuf K
Yusuf K
FullStack Developer
- FromTurkey
- Member sinceMay 2026
Languages
English, Turkish
I'm a full-stack developer building web apps end to end - React, Next.js and TypeScript on the front end, Java, Spring Boot and PostgreSQL on the back end.
I can help with new websites and web apps, landing pages, admin dashboards, REST API development and integration, database design and bug fixing.
Recent work: a car rental & transfer company site with a custom admin panel, plus deployed projects in error tracking, real-time chat and multi-tenant SaaS. I write tested, secure code, reply fast, and stay with the project until you're happy.
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FAQ
I only have an idea, not a list of endpoints. Is that a problem?
Not at all. Tell me what the app should do and I will design the endpoints and the database schema for you, then confirm them with you before writing any code.
Can you connect the API to my existing frontend or app?
Yes. I build React and NextJS frontends myself, so I can wire the API up to yours, fix CORS and auth issues, and hand you working requests rather than just a spec.
Do you deploy it, or do I get just the code?
Both. You get the full source code, and I deploy it with Docker to Render, Railway or your own server so you have a live URL you can actually call. Database setup and environment variables included.
