I will debug and fix PHP, java backend bugs, or write junit

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Miguel Villa

About this gig

Stuck with a critical PHP or Java backend bug? Need reliable JUnit unit tests for your codebase?

As a Systems Engineer with hands-on experience in Java and PHP backend development, I specialize in identifying root causes and delivering clean, well-tested bug fixes for your applications.

What I Can Do For You:

  • Backend Bug Fixing: Resolve logic errors, null pointers, database connection issues, and API runtime errors in Java or PHP.
  • JUnit Unit Testing: Write automated unit tests using JUnit 5 to ensure code reliability and catch regressions early.
  • API Debugging: Fix backend endpoints, request/response payload issues, and connection errors.
  • Code Refactoring: Clean up messy backend code, improve structure, and strengthen error handling.

Tech Stack Covered:

  • Java: Core Java, JUnit 5, object-oriented design
  • PHP: Native PHP, MVC architecture
  • Databases: MySQL, PostgreSQL
  • Tools: Git, IDE Debuggers

Why Choose Me?

  • Engineering Approach: Clean, documented, and maintainable fixes not just quick patches.
  • Clear Communication: I'll walk you through what caused the bug and how it was fixed.
  • Tested Solutions: Code verified with unit tests before delivery.

Please send me details about your bug or code

Get to know Miguel Villa

Miguel Villa

Systems Engineer and Developer Backend

  • FromColombia
  • Member sinceJun 2026
  • Avg. response time1 hour
  • Languages

    English, Spanish
Hello! I am a Systems Engineer and Backend Developer specializing in Java, PHP, and SQL databases. I focus on backend bug fixing, writing optimized SQL queries, and creating automated JUnit 5 unit tests. I deliver clean, well-documented code with fast turnaround times. Let's solve your technical issues today!