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I'm a passionate software developer with 15+ years of experience building robust backend PHP systems and full-stack solutions. I have a track record of refactoring legacy code, delivering scalable backend APIs, and collaborating effectively with teams across multiple projects and companies. I enjoy learning new technologies, mentoring teammates, and applying practical, test-driven approaches to build secure, maintainable software using PHP, MySQL, Symfony, and modern web stacks.…I'm a passionate software developer with 15+ years of experience building robust backend PHP systems and full-stack solutions. I have a track record of refactoring legacy code, delivering scalable backend APIs, and collaborating effectively with teams across multiple projects and companies. I enjoy learning new technologies, mentoring teammates, and applying practical, test-driven approaches to build secure, maintainable software using PHP, MySQL, Symfony, and modern web stacks.

Gastón Cortés Sada

Full Stack Developer, Back-End Developer, Web Developer, +2

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I'm a passionate software developer with 15+ years of experience building robust backend PHP systems and full-stack solutions. I have a track record of refactoring legacy code, delivering scalable backend APIs, and collaborating effectively with teams across multiple projects and companies. I enjoy learning new technologies, mentoring teammates, and applying practical, test-driven approaches to build secure, maintainable software using PHP, MySQL, Symfony, and modern web stacks.…I'm a passionate software developer with 15+ years of experience building robust backend PHP systems and full-stack solutions. I have a track record of refactoring legacy code, delivering scalable backend APIs, and collaborating effectively with teams across multiple projects and companies. I enjoy learning new technologies, mentoring teammates, and applying practical, test-driven approaches to build secure, maintainable software using PHP, MySQL, Symfony, and modern web stacks.

Available to hire

I’m a passionate software developer with 15+ years of experience building robust backend PHP systems and full-stack solutions. I have a track record of refactoring legacy code, delivering scalable backend APIs, and collaborating effectively with teams across multiple projects and companies.

I enjoy learning new technologies, mentoring teammates, and applying practical, test-driven approaches to build secure, maintainable software using PHP, MySQL, Symfony, and modern web stacks.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Backend PHP Developer at Vozitel

February 1, 2025 - November 11, 2025

Designed and maintained backend PHP features; imported data from TXT, CSV, and Excel; worked with MySQL queries and data sets; developed RESTful interfaces; improved code quality and scalability.

Python Developer at AYG International

September 1, 2024 - November 11, 2025

Developed a trading bot using Pandas, DataFrame and NumPy; built backtesting pipelines; used SQLite3 and HDFS for data storage; implemented unit tests and data querying.

Senior Full Stack Developer at MedHub

December 1, 2021 - November 11, 2025

Enhanced code quality by refactoring 100k lines of legacy code; developed RESTful APIs; created unit tests; improved system security with multi-factor authentication, CSRF and XXS protections.

Senior Full Stack Developer at AYG International

May 1, 2021 - November 11, 2025

Designed a user-friendly frontend for enhanced statistics overview; configured MySQL databases; developed unit tests; worked with Symfony 5 and Doctrine ORM.

Full Stack Developer at METRO Markets GmbH

July 1, 2019 - November 11, 2025

Improved code quality by refactoring legacy code; developed unit tests; gained experience with Symfony 4, RabbitMQ, MongoDB, and Angular; set up Symfony ORM framework.

Project Lead Developer at Prosus Capital

January 1, 2012 - November 11, 2025

Configured and installed Linux and Windows servers; set up MySQL and CouchDB for three applications; automated email delivery; worked with Symfony 2 and Doctrine ORM.

Junior Full Stack Developer at Etholutions

December 1, 2008 - November 11, 2025

Planned, developed and rebuilt the client’s administrative portal using HTML, PHP5, Zend Framework 1 and Zend Framework 2 with MySQL and jQuery; improved Excel VBA scripts to increase efficiency.

Python Developer at AYGI International

September 1, 2024 - Present

Trading Bot, using Pandas DataFrame and NumPy; backtesting trading strategy; SQLite3 and Hadoop HDFS to read data storage.

Full Stack Developer at AYGI International

May 1, 2021 - Present

Designed a user-friendly frontend for an enhanced statistics overview. Configured MySQL database. Developed unit tests. Worked with Symfony 5 framework and Doctrine ORM.

Senior Full Stack Developer at Metro Markets GmbH

July 1, 2019 - Present

Improved code quality by refactoring legacy code and reducing bugs. Developed unit tests. Acquired knowledge in Angular and Rabbit MQ. Worked with Symfony 4 framework. Project Lead.

Software Developer at Prosus Capital

January 1, 2012 - Present

Configured and installed Linux and Windows servers. Set up MySQL and CouchDB for 3 applications; ensured robust database management. Automated email delivery for 500 recipients. Worked with Symfony and related technologies.