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Hi, I'm Serhii Zviezdov, an experienced PHP Full-stack Developer with over 10 years in building scalable and high-performance web applications. I specialize in both front-end and back-end development, working with technologies like PHP, Symfony, Laravel, WordPress, and MySQL. I love creating custom themes, plugins, and enterprise-level solutions that improve user experience and help businesses grow. I enjoy collaborating with cross-functional teams and thrive in Agile environments. In my current role, I've contributed to optimizing application performance and ensuring security compliance. Outside of work, I am passionate about continuously learning new technologies and improving my skills to deliver the best possible solutions.…Hi, I'm Serhii Zviezdov, an experienced PHP Full-stack Developer with over 10 years in building scalable and high-performance web applications. I specialize in both front-end and back-end development, working with technologies like PHP, Symfony, Laravel, WordPress, and MySQL. I love creating custom themes, plugins, and enterprise-level solutions that improve user experience and help businesses grow. I enjoy collaborating with cross-functional teams and thrive in Agile environments. In my current role, I've contributed to optimizing application performance and ensuring security compliance. Outside of work, I am passionate about continuously learning new technologies and improving my skills to deliver the best possible solutions.

Serhii Zviezdov

Full Stack Developer, Developer, Programmer, +2

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Hi, I'm Serhii Zviezdov, an experienced PHP Full-stack Developer with over 10 years in building scalable and high-performance web applications. I specialize in both front-end and back-end development, working with technologies like PHP, Symfony, Laravel, WordPress, and MySQL. I love creating custom themes, plugins, and enterprise-level solutions that improve user experience and help businesses grow. I enjoy collaborating with cross-functional teams and thrive in Agile environments. In my current role, I've contributed to optimizing application performance and ensuring security compliance. Outside of work, I am passionate about continuously learning new technologies and improving my skills to deliver the best possible solutions.…Hi, I'm Serhii Zviezdov, an experienced PHP Full-stack Developer with over 10 years in building scalable and high-performance web applications. I specialize in both front-end and back-end development, working with technologies like PHP, Symfony, Laravel, WordPress, and MySQL. I love creating custom themes, plugins, and enterprise-level solutions that improve user experience and help businesses grow. I enjoy collaborating with cross-functional teams and thrive in Agile environments. In my current role, I've contributed to optimizing application performance and ensuring security compliance. Outside of work, I am passionate about continuously learning new technologies and improving my skills to deliver the best possible solutions.

Available to hire

Hi, I’m Serhii Zviezdov, an experienced PHP Full-stack Developer with over 10 years in building scalable and high-performance web applications. I specialize in both front-end and back-end development, working with technologies like PHP, Symfony, Laravel, WordPress, and MySQL. I love creating custom themes, plugins, and enterprise-level solutions that improve user experience and help businesses grow.

I enjoy collaborating with cross-functional teams and thrive in Agile environments. In my current role, I’ve contributed to optimizing application performance and ensuring security compliance. Outside of work, I am passionate about continuously learning new technologies and improving my skills to deliver the best possible solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Ukrainian

Advanced

Russian

Advanced

Work Experience

PHP Software Developer at Currency Exchange International, Corp (CXI)

February 1, 2023 - Present

Lead Developer for a high-traffic financial application, focusing on scalability, security, and performance improvements resulting in a 30% increase in system efficiency. Responsibilities included backend development using PHP, Symfony, MySQL, Doctrine, AJAX, JSON, REST APIs, troubleshooting with Xdebug, and optimizing SQL queries to boost performance by 20%. Led system upgrades to the latest Symfony versions, reduced codebase by 10%, and enhanced maintainability. Implemented security enhancements to improve compliance with financial privacy standards. Managed frontend updates with HTML5, CSS3, Bootstrap, JavaScript, and jQuery, increasing user satisfaction by 15%. Collaborated with marketing and QA teams and participated in Agile/Scrum processes.

PHP Software Developer at P2H

February 1, 2023 - July 14, 2025

Developed complex, high-load, scalable web solutions for Enterprise and Government clients from scratch using PHP, MySQL, PostgreSQL, Symfony, Laravel, WordPress, and Drupal. Customized CMS solutions including Shopify and WordPress themes using Divi, WPBakery, Gutenberg, Elementor, Beaver Builder, and WooCommerce. Improved application speed and scalability by 20%, built responsive websites with HTML5, CSS3, Bootstrap, JavaScript, and jQuery, and collaborated with designers using Figma, resulting in a 15% increase in user satisfaction. Optimized application performance by eliminating bottlenecks (25% improvement per PageSpeed Insights). Maintained code quality through reviews, optimized deployment processes with GIT, SVN, Jenkins, and CI/CD. Created technical documentation and improved project planning. Assisted SEO strategies that raised organic traffic and ROI.