I will bugs and optimize your java spring boot application

R
rezwan943
R
rezwan943
Rezwan
bugs and optimize your java spring boot application
bugs and optimize your java spring boot application
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bugs and optimize your java spring boot applicationbugs and optimize your java spring boot application

About this gig

Is your Spring Boot application throwing errors, failing to start, or running slowly?

I will find the root cause, fix it with clean code, and explain what went wrong.

I can help with:

  • Startup errors, dependency & configuration issues
  • REST API bugs and wrong responses
  • JPA / Hibernate errors, N+1 queries, slow database calls
  • Spring Security & JWT authentication problems
  • Kafka, RabbitMQ & Redis integration issues
  • Performance tuning: caching, indexing, async processing
  • Upgrades to newer Java & Spring Boot versions
  • Code review with clear improvement suggestions

Why choose me?

  • 4+ years of professional Java & Spring Boot experience
  • Built payment and airline systems that run in production
  • Clear, fast communication

Please message me before ordering with the error message or a short description, so I can confirm the fix and the right package.

  • Platform

    • Custom

  • Website type

    • E-Commerce store
    • Business
    • Landing page
    • Portfolio
    • Saas

  • Programming language

    • Go
    • Java
    • JavaScript
    • PHP
    • Python
    • TypeScript
    • HTML & CSS
    • jQuery
    • React
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Get to know Rezwan

Rezwan

Senior Software Engineer

5.0(2)
  • FromBangladesh
  • Member sinceFeb 2022
  • Avg. response time7 hours
  • Last delivery1 year

  • Languages

    English
Software Engineer with 4+ years of experience in Java 21 and Spring Boot 4, specializing in scalable microservices and high-performance backend systems. I build secure APIs with Spring Security & JWT, event-driven systems using Kafka, and optimize performance using Redis caching (up to 40% improvement) and PostgreSQL tuning. Experienced in Docker, CI/CD, and production-grade deployments. Delivered payment systems, flight operations, and enterprise solutions. Let’s build scalable backend systems together.

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