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I will fix java, spring boot, API or backend issues
Alex
About this gig
I will fix your Java, Spring Boot, API or backend issues quickly and professionally.
If your backend is crashing, API returns errors, or something just stopped working I will find the root cause and fix it.
I work with real production issues and focus on:
- Java / Spring Boot bug fixing
- API errors (4xx / 5xx)
- Database issues (MySQL, PostgreSQL, MongoDB)
- Dependency conflicts (Maven/Gradle)
- Authentication / Authorization problems
- CORS, JWT, sessions
- Server configuration issues
- Performance problems
What you get:
- Fast and clean fix
- Clear explanation of the problem
- Updated and working code
- Professional communication
Why clients choose me:
- I analyze the issue before fixing
- I dont guess I find the real cause
- I deliver stable, productionready solutions
Before ordering:
Please send me a short message describing your issue. I will check it and confirm the best package for your case.
Lets fix your backend and get everything running smoothly again.
Get to know Alex
Alex
I will fix Java, Spring Boot, API or backend issues
- FromPoland
- Member sinceMay 2026
- Avg. response time1 hour
Languages
Polish, Russian, English, German
I am a technical specialist experienced in Java, Spring Boot, SQL, Linux, debugging, automation and AI tools. I work with backend systems, APIs, log analysis, performance optimization and small automation scripts. I value clear communication, fast delivery and reliable results.
FAQ
What do you need from me to start?
A: I need a short description of the issue, project access (GitHub, ZIP, or files), and steps to reproduce the problem.
Can you fix my issue if I don’t know what’s wrong?
A: Yes. I will analyze your logs, code, and application behavior to identify the root cause and provide a clean fix.
Do you work with Java and Spring Boot?
A: Yes. I fix issues in Java, Spring, Spring Boot, REST APIs, microservices, and backend integrations.
Can you fix database‑related problems?
If the problem requires more time or a higher package, I will inform you before starting. No surprises.
What if the issue is more complex than expected?
If the problem requires more time or a higher package, I will inform you before starting. No surprises.
Will you provide the updated source code?
Yes. All fixes include updated and working source code.
Can you add new features or improvements?
Yes, but new features are not part of a bug fix. I can do them as a separate order.
Do you offer long‑term support?
If you need ongoing maintenance or additional improvements, I can provide continuous support.
