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$
USD
I will develop a rest api backend in java and spring boot
Ihnat B
About this gig
Hi, I'm Ihnat a backend developer with 3+ years of commercial experience building production systems for an international insurance client in Europe.
I build REST APIs and backend services in Java and Spring Boot. Real production code: secured, tested, documented and ready to deploy not a tutorial project.
WHAT YOU GET
- REST API with clean, documented endpoints
- Database design and migrations
- Authentication and role-based access
- Swagger / OpenAPI documentation
- Unit and integration tests
- Docker setup and deployment guide
WHAT I BUILD
REST APIs · Microservices · Third-party integrations
Database design · Legacy upgrades · Kafka messaging
MY STACK
Java, Spring Boot, Spring Security, Hibernate/JPA
PostgreSQL, MongoDB, Redis, Flyway
Docker, Kubernetes, Kafka, REST and SOAP
Frontend available too: React, Next.js, TypeScript
WHY CLIENTS CHOOSE ME
Enterprise production experience, not just freelance projects
Tested, documented code your team can maintain
Fluent English (C1) clear updates, no language barrier
European timezone, replies within hours
You own 100% of the code
Send me your requirements or existing repo and I'll tell you honestly what it needs.
Get to know Ihnat B
Ihnat B
Java Backend Engineer
- FromPoland
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English, Russian, Polish
I am a Java Backend Engineer with 3 years of commercial experience delivering Spring Boot and Guidewire-based backend systems for insurance and SaaS products. I have strong expertise in REST/SOAP integrations, PostgreSQL, Redis, Kafka, and cloud delivery, with a focus on policy administration and secure API design.
My Portfolio
FAQ
What exactly do I receive?
A Git repository with the full source code, a README with setup instructions, Swagger/OpenAPI documentation for every endpoint, and database migration scripts. You can run it locally or hand it to any developer.
Can you work with my existing codebase?
Yes. Send me the repository and I'll review it before we agree on anything. I'll tell you honestly whether extending it or rebuilding a part of it makes more sense — including when the cheaper option is the right one.
How do I know what package I need?
Endpoint count is the main driver. Roughly: a simple CRUD service is 5-10 endpoints, a typical app backend is 15-25, a full platform is 30+. If you're unsure, message me with what the system should do and I'll tell you which package fits.
Do you write tests?
Yes, from the Build package up. JUnit unit tests as standard, plus integration tests on Production. Tests are the difference between code that works today and code that still works after someone else changes it.
Can you build the frontend too?
Yes — I work with React, Next.js and TypeScript. Message me for a custom offer covering both, or check my other gig for frontend work.
Which databases do you work with?
PostgreSQL and MySQL primarily, plus MongoDB and Redis. I handle schema design and versioned migrations with Flyway so your database changes are trackable and reversible.
Will you deploy it for me?
Deployment is included in the Production package and available as an extra on the others. I'll deploy to your VPS, AWS, Railway, Render or similar. You keep ownership of all accounts and credentials.
Do you sign an NDA?
Yes, happy to. Send it before you order and I'll review and sign it.
What does the 30 days support extra cover?
Bug fixes in the code I delivered, plus questions answered, for a month. New features or additional endpoints are quoted separately so you always know what you're paying for.
What if my project is bigger than the Production package?
Message me for a custom offer. I take on larger projects and work in milestones, so you're never paying ahead for work you haven't seen.
