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Fiverr Pro
English
$
USD
I will fix a java spring boot bug or rest API error
Yunfeng W
About this gig
Is a Java Spring Boot bug blocking your application or REST API?
I am a Java backend developer with 10 years of experience, including technical lead and team leader roles. I can investigate agreed issues such as request validation errors, incorrect API responses, exceptions, configuration problems, or database query bugs.
Please message me before ordering. I will review your reproduction steps, relevant code, and sanitized logs to confirm whether the issue fits this service.
This service covers one agreed, reproducible bug within one existing Spring Boot service. You receive the code changes, verification results, and a clear explanation of the fix.
We will communicate through written Fiverr messages. Work requires a runnable local or test setup; please do not send production credentials, API keys, or private customer data.
New features, major upgrades, architecture changes, production deployment, and ongoing maintenance require a separate quote. Revisions cover the agreed fix; new issues need a scope review.
Get to know Yunfeng W
Yunfeng W
Java Backend Developer for RAG AI Agents and Workflows
- FromChina
- Member sinceSep 2026
Languages
Chinese, English
I build Java backends and AI applications that connect your documents, data, and business systems. With 10 years in Java development and experience as a technical lead and team leader, I deliver APIs, microservices, RAG knowledge bases, AI agents, and automated workflows. I work with Spring Boot/Cloud, Dify, RAGFlow, and GPUStack, covering development, integration, deployment, and performance tuning. I collaborate through written messages and clear project documentation.
FAQ
Should I contact you before ordering?
Yes. Send a short issue summary, Java and Spring Boot versions, reproduction steps, and sanitized logs. I will confirm scope and whether I can take the work before you order.
What does one bug mean?
One agreed, reproducible issue with a defined expected result in one service. Several symptoms may share a cause, while similar errors may have different causes. We will confirm the scope during the initial review.
Do you need access to production?
No. Please provide a runnable local or test environment and sanitized sample data. Do not send production passwords, API keys, or customer data. Production deployment is not included.
Can we have a call, and what do revisions cover?
I work through written Fiverr messages and documentation. Revisions address the agreed acceptance criteria for the delivered fix. New features, unrelated bugs, and environment changes need a separate scope review.
