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I will build a spring boot rest api and java backend
D Hansanath
About this gig
Need a secure, well-documented backend for your web or mobile app?
I build Spring Boot REST APIs and Java backends that are clean, tested and ready for production.
WHAT YOU GET
- REST API with CRUD endpoints, validation and error handling
- JWT login, roles and Spring Security
- MySQL, PostgreSQL or MongoDB with JPA / Hibernate
- Swagger / OpenAPI docs and JUnit tests
- Docker setup and full source code
WHAT OTHERS DON'T OFFER
- Upgrade Spring Boot 2 to 3 and Java 8 / 11 to Java 21
- Deploy to Kubernetes with Helm (CKA certified)
- Redis caching and performance tuning
- Add AI to your Java app with Spring AI or an MCP server
- Fix bugs or add features to an existing project
WHY ME
I'm a Java backend engineer working on production rental platforms with Spring Boot, Redis, Docker and Kubernetes. I use a layered architecture so your code is easy to extend.
Works with React, Angular, Vue, Flutter, Android or iOS.
HOW IT WORKS
- Send your requirements or existing code
- I confirm scope and timeline
- You test the API on Swagger or Postman
- Approve and receive the source code
Message me before ordering so I can recommend the right package.
Get to know D Hansanath
D Hansanath
Java Full Stack and DevOps Engineer, Spring Boot, Docker, Kubernetes
- FromSri Lanka
- Member sinceNov 2022
- Avg. response time1 hour
Languages
Sinhala, English
Need a backend that scales, or an app deployed securely on your own server? I'm a Java full-stack and DevOps engineer building production software at RYDE (Rydeflexi rental platform). I build Spring Boot REST APIs, Laravel and JavaScript web apps with MySQL, and ship them with Docker, Kubernetes and Helm on Linux VPS or cloud, with security hardening built in. Certified: CKA, Oracle OCP, AWS Developer. Currently doing an MSc in Software Engineering. Clear updates, clean code, on-time delivery. Message me with your project and I'll reply with a plan.
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FAQ
Which database do you use?
MySQL, PostgreSQL or MongoDB. Tell me about your project and I will suggest the best fit.
Do you add authentication?
Yes. JWT login and role-based access with Spring Security are included in the Secure REST API and Production Backend packages.
Can you connect it to my mobile app?
Yes. The API works with Flutter, Android, React and other frontends, and I can help you integrate it.
Will you document the API?
Yes. Swagger / OpenAPI documentation is included in the Secure REST API and Production Backend packages, so your team can test every endpoint.
Can you fix or extend my existing Spring Boot project?
Yes. Message me first with the details and I will review your code and quote the fix or new endpoints.
Can you upgrade my old Spring Boot 2 project to Spring Boot 3 and Java 21?
Yes. I migrate javax to jakarta, Spring Security 6, Hibernate 6 and dependencies, fix breaking changes and run your tests. Message me with your project size for a quote.
Can you deploy my backend to Kubernetes or a VPS?
Yes. I'm a Certified Kubernetes Administrator (CKA). I can containerize your app with Docker and deploy it to Kubernetes with Helm, or to a Linux VPS or cloud server. Deployment is in the Production Backend package.
