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I will fix bugs in your java spring boot backend or rest API
Zhe X
About this gig
Need help with a Java or Spring Boot backend issue? I can investigate and fix one reproducible bug in an existing backend service or REST API.
My background includes e-commerce backends, PHP-to-Java service migration, order workflows, MySQL, Redis and Spring Cloud.
This package covers:
- One clearly defined, reproducible backend bug
- Diagnosis and focused source-code changes
- Verification of the affected behavior
- A short explanation of the cause, fix and verification steps
- One revision within the agreed scope
Please message me before ordering with the error, expected behavior, reproduction steps and relevant technology versions so we can confirm scope. Provide a runnable project or a minimal reproduction, with secrets and personal data removed.
New features, full application development, major refactoring, frontend work and production deployment are outside this package. Larger issues can be scoped separately through Fiverr.
Get to know Zhe X
Zhe X
Senior Java Backend Developer
- FromChina
- Member sinceNov 2026
Languages
Chinese
I am a Senior Java Backend Developer with extensive experience in delivering e-commerce systems, migrating legacy services, and building reusable backend components. I have a proven track record of coordinating cross-functional teams and integrating AI applications into multimodal workflows. I am comfortable owning backend delivery and working across the full development lifecycle. Personal AI-assisted projects include English-learning apps, comic/short-drama workflows and an open-source LLM course platform. These are prototypes or personal-use projects, not client deployments.
Other Software Development Services I Offer
FAQ
What is included in one bug fix?
One reproducible issue in an existing Java or Spring Boot backend, scoped before ordering. It includes source changes, verification steps and a short fix explanation. New features, large refactors and production deployment are not included.
