I will fix any bug in your java, spring boot, or rest API project

A
aymanshaikh97
A
aymanshaikh97
Ayman Shaikh
fix any bug in your java, spring boot, or rest API project
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fix any bug in your java, spring boot, or rest API project

About this gig

Struggling with bugs in your Java or Spring Boot application? I'll fix them fast clean, tested, and properly documented.


Hi, I'm Ayman a Senior Java Developer with 6+ years of experience building and maintaining production-grade backend systems used by thousands of real users.

I've worked on telecom-grade messaging platforms (2G/3G/4G) and IoT products, and real-time systems using WebSockets so I know how to trace tricky bugs quickly and fix them the right way, not just patch symptoms.

What I'll fix for you:

  • Application crashes & runtime errors
  • REST API issues (endpoints not working as expected)
  • Database & query problems (MySQL, PostgreSQL, Hibernate/JPA)
  • Authentication & security bugs (Spring Security, JWT)
  • WebSocket / real-time connection issues
  • Performance bottlenecks & slow queries
  • Logic errors & unexpected app behavior


Tech Stack:

Java | Spring Boot | Hibernate/JPA | REST APIs | MySQL | PostgreSQL | WebSockets | JWT | HMAC


Not sure if I can solve your issue? Message me first I'll take a quick look before you commit to an order.

Let's get your application running smoothly again!

  • Programming language

    • Java

  • Expertise

    • Debugging
    • Security
    • Design
    • Databases

  • Frontend framework

    • Angular
    • Next.js
    • React.js

  • Backend framework

    • Spring
    • Spring Boot

Get to know Ayman Shaikh

Ayman Shaikh

Senior Java Developer

  • FromPakistan
  • Member sinceJul 2026
  • Avg. response time1 hour

  • Languages

    Urdu, Sindhi, English
Hi, I'm Ayman - a Sr Java Developer with 6+ years of experience building robust, scalable backend systems for real-world products. I specialize in Java, Spring Boot, Hibernate/JPA, REST APIs, MySQL/PostgreSQL, WebSockets, JWT/Spring Security, and Docker for high-performance systems. I've built telecom messaging systems (2G/3G/4G, JDiameter & SS7), IoT integrations (Bluetooth to Kafka pipelines), and IoT products. ✅ Clean, maintainable code ✅ Strong design patterns & best practices ✅ Full backend stack expertise ✅ Clear communication & on-time delivery Let's discuss your project message me!

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