I will fix your java spring boot backend bug or API error

M
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M
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miao

About this gig

Stuck with a broken API? Need a rock-solid Spring Boot backend, fast?

I'm a seasoned Java engineer who has built and rescued 50+ production-grade REST APIs. I specialize in Spring Boot, microservices, and clean, maintainable code that scales.

What makes me different:

I don't just code I diagnose. Most gigs will rewrite your API blindly. I read your existing architecture, find the root cause, and fix it with surgical precision.

 Real 48-hour delivery on most fixes and standard CRUD APIs.

Every delivery includes a Postman collection and Swagger documentation no guesswork for your frontend team.

️ I write defensive, production-ready code: proper error handling, input validation, JWT security, and rate limiting by default, not as an "extra".

What I can do for you:

  • Build a complete REST API from scratch (Java 17+, Spring Boot 3.x)
  • Debug and fix existing APIs (bugs, slow endpoints, memory leaks, security gaps)
  • Add new features to your current Spring Boot project
  • Integrate third-party services (payments, email, cloud storage, AI APIs)
  • Deploy your API with Docker and provide CI/CD pipelines

Every order includes:

Clean, well-commented source code (GitHub/GitLab)

Ready-to-import Postman coll

Get to know miao

miao

Senior Java Development Engineer

  • FromChina
  • Member sinceApr 2026
  • Languages

    English, Chinese
Senior Java Developer with 10 years of experience in backend development, system architecture, and enterprise systems. I have served as a core technical contributor and team lead, responsible for key module development, API design,database design, code review, task planning, and production issue troubleshooting. Experienced in Java, Spring Boot, REST APIs, databases, Redis, message queues, and system integration.

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