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As a full-stack developer, I've gained valuable experience by contributing to various projects, progressing from junior to senior roles. This journey has been key to my success in delivering effective solutions. I enjoy challenges that excite me, and my key skills include keen problem-solving and breaking down risks, using a mix of logic and experience to find the best approach. I stay passionate about new technologies and continuously work to expand my expertise by learning from every project I take on. I thrive in collaborative environments, having worked in global agile teams across CET and EST time zones.…As a full-stack developer, I've gained valuable experience by contributing to various projects, progressing from junior to senior roles. This journey has been key to my success in delivering effective solutions. I enjoy challenges that excite me, and my key skills include keen problem-solving and breaking down risks, using a mix of logic and experience to find the best approach. I stay passionate about new technologies and continuously work to expand my expertise by learning from every project I take on. I thrive in collaborative environments, having worked in global agile teams across CET and EST time zones.

Antonio Romero Senior Software Engineer

Full Stack Developer, Developer, Back-End Developer, +3

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As a full-stack developer, I've gained valuable experience by contributing to various projects, progressing from junior to senior roles. This journey has been key to my success in delivering effective solutions. I enjoy challenges that excite me, and my key skills include keen problem-solving and breaking down risks, using a mix of logic and experience to find the best approach. I stay passionate about new technologies and continuously work to expand my expertise by learning from every project I take on. I thrive in collaborative environments, having worked in global agile teams across CET and EST time zones.…As a full-stack developer, I've gained valuable experience by contributing to various projects, progressing from junior to senior roles. This journey has been key to my success in delivering effective solutions. I enjoy challenges that excite me, and my key skills include keen problem-solving and breaking down risks, using a mix of logic and experience to find the best approach. I stay passionate about new technologies and continuously work to expand my expertise by learning from every project I take on. I thrive in collaborative environments, having worked in global agile teams across CET and EST time zones.

Available to hire

As a full-stack developer, I’ve gained valuable experience by contributing to various projects, progressing from junior to senior roles. This journey has been key to my success in delivering effective solutions. I enjoy challenges that excite me, and my key skills include keen problem-solving and breaking down risks, using a mix of logic and experience to find the best approach.

I stay passionate about new technologies and continuously work to expand my expertise by learning from every project I take on. I thrive in collaborative environments, having worked in global agile teams across CET and EST time zones.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Work Experience

Senior Software Engineer at Symmetric

February 1, 2025 - August 18, 2025

Developed backend solutions using PHP and Laravel to securely store and manage football match data optimized for high performance and scalability. Built backend APIs for football score predictions and competitions, enabling user interaction with live data and enhancing experience. Optimized MySQL database for high-volume data and real-time responsiveness including importing/exporting CSV/Excel files. Reduced longest endpoint delay from 30 to 4 seconds during peak traffic, improving performance. Analyzed query performance using MySQL EXPLAIN and Laravel's query profiler, identifying unoptimized joins and missing indexes. Introduced proper indexing and composite indexes, and implemented table partitioning for time-series data by league and season. Enhanced scalability using Redis caching for frequently accessed data, and optimized Laravel's Eloquent ORM with eager loading to minimize queries. Built admin dashboard frontend with HTML, CSS and React for smooth, responsive user experience.

Full Stack Engineer at VA Leaders Group

May 1, 2023 - August 18, 2025

Developed a Twilio-based web application for job interviews targeting American agents using Yii for backend, React for frontend, and MySQL for database management. Built backend with PHP and Yii integrating AWS S3 for media storage, DynamoDB for scalable data management, and SQS for message queuing to handle tasks such as appointment scheduling and notifications. Integrated Twilio’s TwiML and IVR for call routing, information sharing, surveys, and appointment scheduling automations. Implemented voice and video calls via Twilio, enhancing communication for agents and candidates. Added SMS mass messaging with automatic opt-in/opt-out based on keywords, and integrated automated WhatsApp messaging using Twilio’s WhatsApp Business API. Developed task queue and appointment scheduling system optimizing workflows between agents and clients. Managed SMS preferences and compliance using Twilio’s SMS API.

Frontend Developer at Boston Consulting Group

September 1, 2021 - August 18, 2025

Developed and maintained backend solutions with PHP and Symfony integrating databases and managing user interactions for reliable web experience. Built company website dashboard frontend with HTML, CSS, JavaScript, Ajax and jQuery ensuring smooth efficient UX. Collaborated with design team for responsive, mobile-first pixel-perfect layouts using Bootstrap compatible across devices. Enhanced dynamic content and user interactivity with DHTML and jQuery. Developed and deployed RESTful APIs in PHP and Symfony supporting real-time data exchange for trading platform. Optimized backend processes including business logic, data processing, and user authentication using PHP and Symfony for server-side scripting. Integrated AWS services for scalable, secure and efficient backend infrastructure. Managed version control with Git enabling smooth workflows and deployments. Used MySQL and stored procedures to handle complex DB operations optimizing query performance and maintaining data integrity. Aut

Senior Software Engineer at Symmetric

February 1, 2025 - August 18, 2025

Developed backend solutions with PHP and Laravel to securely store and manage football match data, optimizing for high performance and scalability. Built a backend API for football score predictions and competitions for the League+ project, enhancing user interaction with live football data. Optimized the MySQL database to handle high volumes of match data with real-time responsiveness, including importing/exporting CSV/Excel files and efficient querying. Reduced the longest endpoint delay from 30 seconds to 4 seconds during peak traffic. Analyzed query performance with MySQL EXPLAIN and Laravel's query profiler, identifying and fixing performance issues such as unoptimized joins and missing indexes. Introduced proper indexing and composite indexes for multi-column searches, improving query times significantly. Implemented table partitioning for time-series data like fixtures and predictions by league and season to improve query efficiency. Enhanced scalability by adding Redis caching

Full Stack Engineer at VA Leaders Group

May 1, 2023 - August 18, 2025

Developed a Twilio-based web application for job interviews for American agents, using Yii for the backend, React for the frontend, and MySQL for database management ensuring smooth integration and data flow. Built backend with PHP and Yii, integrating AWS S3 for media storage, DynamoDB for scalable data management, and SQS for message queuing to efficiently handle tasks such as appointment scheduling and notifications. Integrated Twilio’s TwiML and IVR systems for call routing, information sharing, surveys, and appointment scheduling, automating key interview process tasks. Implemented voice and video calls using Twilio to enhance communication capabilities between agents and candidates, providing a more interactive interview experience. Added SMS mass messaging features enabling efficient communication with large candidate groups, reducing manual outreach efforts. Integrated automated WhatsApp messaging using Twilio’s WhatsApp Business API to provide an additional communication c

Frontend Developer at Boston Consulting Group

September 1, 2021 - August 18, 2025

Developed and maintained backend solutions using PHP and Symfony, integrating databases and managing user interactions to provide a reliable web experience. Built the company website's dashboard frontend using HTML, CSS, JavaScript, Ajax, and jQuery, ensuring a smooth and efficient user experience. Collaborated closely with the design team to implement responsive, mobile-first, pixel-perfect layouts using Bootstrap, ensuring compatibility across devices. Used DHTML and jQuery to enhance dynamic content and improve user interactivity on the site. Developed and deployed RESTful APIs in PHP and Symfony to support real-time data exchange for the trading platform. Optimized backend processes such as business logic, data processing, and user authentication using PHP and Symfony for server-side scripting. Integrated AWS services to provide scalable, secure, and efficient backend infrastructure for the website. Managed version control with Git, ensuring smooth project workflows and deployments