Browse categories
Explore
Fiverr Pro
English
$
USD
I will fix one reproducible java spring boot backend bug
Shen Jiawen
About this gig
I will investigate and fix one reproducible bug in your Java Spring Boot backend.
I have five years of Java backend experience across education, AI application workflows and logistics systems, including leading a five-person development team.
This package covers one clearly defined issue in a runnable application, such as a REST API error, incorrect validation, a null-pointer exception or a simple database mapping defect.
You receive:
- A focused source-code patch
- A root-cause explanation and changed-file summary
- A regression test for the reported issue, where it can be reproduced in the supplied test environment
- Verification steps and relevant test results
- One revision against the original reported issue
Please message me with reproduction steps before ordering so I can confirm feasibility. Delivery is 3 days after complete requirements.
Intermittent production incidents, unavailable environments, performance audits, security audits, framework upgrades and major refactors need a separate scope. Communication is primarily written in English or Chinese.
Get to know Shen Jiawen
Shen Jiawen
Java Backend Developer, Spring Boot and AI API Integration
- FromChina
- Member sinceOct 2026
- Avg. response time1 hour
Languages
Chinese, English
I am a Java backend developer with five years of experience in education platforms, AI applications and logistics systems. I have led a five-person development team and worked on API design, asynchronous workflows and data production tools. I offer Spring Boot REST API development, focused bug fixes, AI API integration and Excel/CSV import validation. My stack includes Java, Spring Boot, MyBatis, MySQL, Redis, RabbitMQ and Elasticsearch. I focus on clear requirements, tested code and practical documentation. Communication is primarily written in English or Chinese.
Other Software Development Services I Offer
FAQ
What counts as one bug?
One reproducible defect with one expected behavior and a focused fix. Several unrelated errors, new features or broad refactors are separate tasks.
What if the issue cannot be reproduced?
Please share reproduction steps before ordering. I need a runnable environment and sample data to confirm scope. Production-only or intermittent incidents require a separately agreed diagnostic task.
Does this include performance or security audits?
No. This package is for a defined functional defect. Performance investigations, security reviews, framework upgrades and infrastructure issues need a separate scope.
What does the revision cover?
One correction against the original issue and acceptance criteria. New defects, changed requirements or additional features are separately scoped. Updates are primarily written in English or Chinese.
