I will fix PHP bugs, add features and improve your website

A
antonioafonseca
A
antonioafonseca
Antonio Fonseca
fix PHP bugs, add features and improve your website
Full Screen
fix PHP bugs, add features and improve your website

About this gig

Need help fixing a PHP application?

I can:

Fix PHP bugs

Add new features

Improve performance

Work with legacy code

Connect APIs

Optimize SQL queries

Maintain existing systems

  • Programming language

    • PHP

  • Expertise

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

Get to know Antonio Fonseca

Antonio Fonseca

Backend Software Developer

  • FromBrazil
  • Member sinceJul 2026

  • Languages

    Portuguese
I'm a Software Engineer with experience developing and maintaining business applications, ERP integrations, backend systems, and databases. I work mainly with PHP, Java, C#, SQL Server, MySQL and Oracle, helping companies improve existing software, build new features, fix bugs, optimize databases and integrate systems through APIs. I value clean code, clear communication and reliable deliveries. Services include: • PHP Development • Java Development • C# Development • SQL Queries & Database Optimization • API Integration • Bug Fixing • Legacy System Maintenance • Backend Development

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