Віктор

Victor Sereda
PHP Back-end Developer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) telegram linkedIn Sumy, Ukraine

SUMMARY
Senior PHP Back-end Developer with 8+ years of experience building scalable web applications in Social
Networking, FinTech, eCommerce, and SaaS. Led the development of complex platforms from concept to
production, including a social network serving over 1 million users with real-time communication, multilingual
support, and payment integrations. Experienced in leading cross-functional teams, designing system architecture, and
optimizing application and database performance. Strong expertise in PHP, MySQL, Node.js, WebSockets, OAuth,
and CI/CD, with a proven track record of delivering reliable, high-impact business solutions.

SKILLS
Backend: PHP 5/7/8, Symfony, Zend Framework, Yii, Node.js
Databases: MySQL, PostgreSQL, Database Design, Query Optimization, Indexing, Triggers, Data Modeling
Real-Time & Communication: WebSockets, WebRTC, Node.js Real-Time Applications, Chat Systems, Video
Conferencing
Frontend: JavaScript, jQuery, AJAX, HTML, CSS
DevOps & Tools: Docker, Git, CI/CD
Domain Expertise: Social Networks, eCommerce, FinTech, SaaS, Payment Gateway Integrations, Chatbots, High-
Load Systems
Languages: Ukrainian Native, English Upper-Intermediate (B2)

EXPERIENCE
PHP developer, Nova Poshta ( Nova Digital ) 03.2022-01.2026
Designed and developed new internal tools and features to improve business operations and product efficiency.
Worked closely with a cross-functional development team to build and maintain self-service terminal management
solutions.
Improved application performance through database optimization, query tuning, and efficient data structure design.
Contributed to the delivery of scalable and reliable enterprise solutions in an Agile development environment.
03.2014- 01.2022
PHP developer, NDA

Progressed from Software Developer to Team Lead, managing a cross-functional team of 8 specialists, including
Front-end, Back-end, QA, and Technical Support engineers.
Led the end-to-end development of a corporate social networking platform, from initial business requirements and
architecture design to production release and ongoing scaling.
Delivered key features including multilingual support, real-time chat, media sharing, video conferencing, Telegram
notifications, role-based access control, and a comprehensive administration panel.
Designed and optimized high-load backend services using PHP, Node.js, MySQL, WebSockets, OAuth, Git, and
CI/CD, successfully supporting a user base of over 1 million users.
Developed chatbot-driven user onboarding flows and integrated 10+ payment providers, including PayPal and
Interkassa.

EDUCATION
Specialist Degree in Computer Science, 2008-2013
Sumy State University