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$
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I will build a secure rest API backend with java spring boot
Geronimo Mar
About this gig
I build reliable, well-structured REST APIs using Java and Spring Boot the same stack I used to develop the backend of Artelier, a full e-commerce platform with an event-driven architecture powered by Apache Kafka and Redis caching.
What you get:
- REST API design and implementation with Spring Boot
- Integration with the database of your choice (PostgreSQL, MySQL, MongoDB)
- JWT authentication and role-based access control
- API documentation with Swagger/OpenAPI
- Unit and integration testing (JUnit)
- Clean, well-organized repository with a professional README
Higher-tier packages also include:
- Deployment to your preferred cloud provider (AWS, Azure, Railway)
- Code quality analysis with SonarQube
- Detailed code comments explaining key logic and design decisions
I focus on writing code that's not just functional, but maintainable something your team (or future self) can actually build on. Before starting, I'll make sure I fully understand your requirements so the final delivery matches what you actually need, not just what was written in the order.
Need something specific not listed above? Message me before ordering and I'll confirm if I can help.
Get to know Geronimo Mar
Geronimo Mar
Full Stack Developer
- FromColombia
- Member sinceAug 2025
Languages
English, Spanish
I’m a Software Engineer and Full Stack Developer with hands-on experience building web applications, REST APIs, backend services, and real-time systems. I work primarily with Java, Spring Boot, React, Next.js, and TypeScript, with experience in Python, FastAPI, PostgreSQL, MongoDB, Redis, Docker, CI/CD, AWS, and Azure. I focus on building clean, maintainable, and reliable software, with clear communication throughout development.
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FAQ
Can I choose which database to use?
Yes. I work with PostgreSQL, MySQL, and MongoDB. Let me know your preference before placing the order, or I can recommend one based on your project's needs.
What if I need more endpoints than the package includes?
No problem — we can discuss adding extra endpoints for an additional fee based on the scope, or you can upgrade to a higher package that better fits your needs. Just message me before ordering to confirm the details.
Can you work with my existing codebase instead of starting from scratch?
Yes, but please message me first with details about the current state of your project. Working with an existing codebase can take more time depending on its complexity, so I'll confirm scope and timeline before you order.
Do you provide the source code and deployment credentials?
Yes, full source code is included in every package. Deployment (Standard and Premium packages) is set up on your own cloud account — I won't ask for permanent access to your infrastructure beyond what's needed to complete the delivery.
Is testing included?
Standard and Premium packages include unit testing with JUnit to verify the API works as expected. If you need testing on the Basic package, let me know before ordering and we can discuss adding it.
What if the third-party API I need isn't a standard one?
Integration pricing (see Gig Extras) covers standard, well-documented APIs like Stripe or Cloudinary. For complex or poorly documented third-party services, please message me first for a custom quote.
Can we communicate in Spanish?
Yes, I'm a native Spanish speaker and fully comfortable working with Spanish-speaking clients as well.
