I will fix java bugs, debug backend code, and troubleshoot application errors

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brandonsanjuan
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brandonsanjuan
Brandon D

About this gig

Java & MySQL Developer | Spanish-Speaking | Worldwide Requests Welcome!

I speak Spanish and welcome requests from clients worldwide. International clients are welcome, and I offer clear written communication through Fiverr messages.

I'm a Software Engineer with 5+ years of professional experience in Java backend development, MySQL databases, and enterprise applications.

What I can help you with:

  • Java debugging and bug fixing
  • MySQL queries, errors, and stored procedures
  • SQL query optimization and performance improvements
  • Backend logic and application errors
  • REST API and SOAP Web Service troubleshooting
  • Java, JSP, JavaScript, and jQuery issues
  • Database queries, JOINs, and data processing
  • Code review and troubleshooting

Why choose me?

  • 5+ years of professional development experience
  • Experience with enterprise and financial systems
  • Clean, maintainable, and structured code
  • Clear documentation and explanations
  • Professional written communication

What you'll receive:

Fixed or improved code, a clear explanation of the changes, and practical solutions tailored to your needs.

Please contact me before placing an order. I'm happy to review requests from anywhere in the world!

Let's solve your Ja

Get to know Brandon D

Brandon D

SemiSenior Software Developer

  • FromMexico
  • Member sinceOct 2026
  • Languages

    English, Spanish
I am a Semi-Senior Software Developer with over 5 years of experience in developing and modernizing enterprise applications. I specialize in Java backend development, REST/SOAP integrations, and SQL, with a strong focus on financial systems and leveraging AI tools to optimize my development workflows.