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Fiverr Pro
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$
USD
I will fix spring boot backend bugs, db or auth errors
Emilio Funes
About this gig
Need your Java Spring Boot backend fixed fast and safely?
I troubleshoot bugs, database errors, authentication issues, and broken APIs so your app runs smoothly again.
What I do
- Root-cause debugging with log tracing
- Fixes for Spring Security, JWT / OAuth2, REST endpoints, PostgreSQL & MySQL connection errors
- Code cleanup and best-practice refactor
- Optional Swagger / Postman docs and detailed comments
⭐ Why choose me
- 4 + years focused on Java & Spring Boot
- Clean, secure code thats easy to maintain
- Clear communication and quick turnaround
Not sure what's wrong? Send your error message or describe the problem--I'll guide you to the right package and get your backend working again.
Get to know Emilio Funes
Emilio Funes
Backend Developer, Secure and Scalable APIs
- FromArgentina
- Member sinceDec 2024
- Last delivery5 months
Languages
English, Spanish
I'm Emilio, a backend developer focused on building secure and scalable REST APIs using Java (Spring Boot), Laravel, and FastAPI. I integrate Stripe, implement JWT/OAuth2 authentication, and connect PostgreSQL, MySQL, or MongoDB with clean, reliable code. I also fix bugs, optimize performance, and deliver clear documentation. Let’s work together to build powerful backends that support your business.
Contact us to understand our process.
My Portfolio
FAQ
What do I need to send you to get started?
Please share a clear description of the issue, error messages or logs, access to the codebase (via GitHub/Zip), and your preferred environment setup if applicable.
What kinds of bugs can you fix?
I can fix issues related to authentication (JWT, Spring Security), API endpoints, database errors (MySQL/PostgreSQL), exceptions, logic flaws, CORS, and general performance issues in your Spring Boot backend.
Will you provide documentation or comments?
Yes! I always include inline comments for the fixes I make. Full documentation (e.g., README, setup instructions, API docs) is available as a Gig Extra.
Can you deploy or test the fix on my server?
Yes, if you add the deployment extra, I can help you test the solution in your staging or production environment (VPS, shared hosting, etc.).
What if I don’t know what’s causing the error?
No problem! Just describe what’s happening and I’ll investigate it for you. If it’s unclear, I’ll let you know what steps to take before proceeding.
