I will debug spring boot rest API and fix java backend bugs

S
shayyanali328
S
shayyanali328
Shayan Ali khan
debug spring boot rest API and fix java backend bugs
debug spring boot rest API and fix java backend bugs
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debug spring boot rest API and fix java backend bugsdebug spring boot rest API and fix java backend bugs

About this gig

Production down? API broken? I will diagnose and fix your Java or Spring Boot issue fast, with a root cause analysis so it does not happen again.


I fix critical backend bugs across the full Java stack from null pointers to Hibernate errors to JWT misconfigurations. Every fix includes a clear explanation and a prevention plan.


What I fix:

      Critical bugs: null pointers, memory leaks, thread deadlocks, race conditions

      API failures: 500 errors, CORS issues, auth breaks, timeout problems

      Security holes: JWT misconfig, SQL injection risks, exposed endpoints

      Database issues: connection pool, slow queries, Hibernate lazy loading, schema mismatches

      Build & deploy failures Maven/Gradle, Docker crashes, environment mismatches

      Performance bottlenecks slow response, memory bloat, CPU spikes, N+1 query problems


Tech Stack:

Java 8/11/17/21 · Spring Boot · Spring Security · Hibernate · JPA · MySQL · PostgreSQL · MongoDB · Maven · Gradle · Docker · JUnit · Mockito · Redis


Every delivery includes: bug fix, root cause explanation, prevention strategy, and source code.

  • Programming language

    • Java

  • Expertise

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

  • Frontend framework

    • Angular
    • Bootstrap
    • React.js

  • Backend framework

    • Spring

Get to know Shayan Ali khan

Shayan Ali khan

Backend Developer Java Spring Boot PHP Laravel REST API

  • FromPakistan
  • Member sinceJul 2022

  • Languages

    Urdu, Hindi, English
• Backend Developer with 4+ years experience • Java, Spring Boot, PHP, Laravel development • REST API design & API integration • Secure, scalable web applications • MySQL & PostgreSQL database design • Bug fixing, code optimization & performance tuning • CRM and business web applications • OWASP security practices & vulnerability testing Need a reliable developer for backend development, APIs, or secure web apps? Contact me.

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