Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix bugs in your java spring boot application
Hamza Nadeem
About this gig
Is your Java Spring Boot application throwing
errors you can't figure out?
I will identify and fix bugs in your backend
application quickly, cleanly, and with a full
explanation of what went wrong.
WHY CHOOSE ME?
Professional experience from Nisum Pakistan
a global technology company
I don't just fix the bug I explain WHY
it happened so it never comes back
Fast delivery most fixes within 24-48 hours
BUGS I FIX:
REST API errors (400 Bad Request,
401 Unauthorized, 404 Not Found, 500 Server Error)
Spring Security and JWT authentication issues
JPA / Hibernate / database errors
NullPointerException and runtime exceptions
Application startup failures
Dependency injection errors (@Autowired issues)
CORS errors
Validation errors
Performance and N+1 query problems
Maven / Gradle build errors
WHAT I NEED FROM YOU:
Your project files or GitHub link
Description of the bug and error message
Steps to reproduce the issue
MESSAGE ME BEFORE ORDERING
Share your error message or describe the issue
first I will confirm I can fix it before
you place the order.
Tech stack I work with:
Java · Spring Boot · Spring
Get to know Hamza Nadeem
Hamza Nadeem
Java Spring Boot Backend Developer
- FromPakistan
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English
I am a Java Spring Boot Backend Developer with
hands-on experience building real-world backend
systems at Nisum, a global technology company.
I specialize in:
✅ REST API development with Java & Spring Boot
✅ MySQL & PostgreSQL database design
✅ JWT Authentication & Spring Security
✅ Microservices architecture
✅ Bug fixing in existing Java applications
I have built projects including a Shopping Cart
Microservices System and an Electronics Warehouse
Management System - both using Java, Spring Boot,
and MySQL in a professional environment.
Other Software Development Services I Offer
FAQ
What if you cannot fix my bug?
If I genuinely cannot fix the issue after reviewing your code, I will let you know before you place an order. I never take a project I cannot deliver.
Do I need to share my full project?
Sharing the relevant files and the error message is usually enough. A GitHub link works best. I treat all code as confidential.
What information should I send first?
Send me: the error message or stack trace, what you expected to happen, and what is actually happening. A GitHub link or zip file of the project helps a lot.
Can you fix bugs in an existing client project?
Yes, I work with existing projects regularly. As long as it uses Java and Spring Boot, I can help regardless of the project size.
Do you offer support after delivery?
Yes, the Premium package includes 7 days of free support after delivery. Basic and Standard include 1 revision if the fix does not work as expected.
