I will urgently fix java spring boot backend bugs and refactor your code

W
wasif6029
W
wasif6029
Wasif
urgently fix java spring boot backend bugs and refactor your code
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urgently fix java spring boot backend bugs and refactor your code

About this gig

If your Spring Boot backend is failing, throwing 500s, crashing, or becoming messy to maintain I can help fast.


I will debug your Java Spring Boot project, fix multiple issues, refactor risky areas, and deliver a clean, stable codebase with a clear summary of changes.


What I fix

API errors (4xx/5xx), crashes, exceptions

Wrong output / business logic bugs

Database/JPA issues, failing queries, migrations

Performance problems (slow endpoints, timeouts)

Code smells / messy structure (safe refactor)


How I work (fast + safe)

1) Triage + reproduce the issue

2) Identify root cause

3) Patch + verify

4) Refactor carefully (no breaking changes)

5) Send a clear summary + verification steps


Note: New features, big rewrites, or multi-service infrastructure changes are not included unless agreed.

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  • Programming language

    • Java

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Security
    • Databases

  • Backend framework

    • Spring

Get to know Wasif

Wasif
  • FromBangladesh
  • Member sinceOct 2023

  • Languages

    Bengali, English
I’m a Java Spring Boot backend specialist who builds and stabilizes production APIs. I develop REST services with clean architecture, JPA/Hibernate, PostgreSQL/MySQL, Swagger/OpenAPI docs, and JWT/Spring Security. I also handle third‑party integrations (webhooks, payments) and performance issues like slow queries/timeouts. For urgent bugs, I reproduce the issue, find the root cause, apply a safe fix, and refactor the risky area without breaking behavior. You get clean commits/PRs, a short summary, and verification steps—so your backend is stable and release‑ready.

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