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Andrii Kozak
Backend Software Engineer
PHP • Laravel • JavaScript • MySQL
Ternopil, Ukraine | [открыть контакты](см. выше в блоке «контактная информация») | LinkedIn

Professional Summary
Backend Software Engineer with 5+ years of commercial experience designing, developing, deploying, and maintaining pro-
duction web applications using PHP and Laravel.
As the sole backend developer, built and launched two production systems from scratch: a social networking platform serving
20,000+ users and a CRM system for an Internet Service Provider serving 10,000+ users. Experienced in backend architecture,
REST APIs, database design, performance optimization, third-party integrations, and production support.

Technical Skills
Languages: PHP, JavaScript, SQL
Framework: Laravel
Backend: REST APIs, Laravel Queues, WebSockets
Database: MySQL
Infrastructure: Linux, Apache, Git
Tools: Composer, npm
Core Skills: OOP, MVC, Database Design, Performance Optimization, Third-party API Integration

Professional Experience
Software Development Company October 2021 – Present
Backend Software Engineer
Primary backend developer responsible for the architecture, development, deployment, and maintenance of two production
web applications:
• Social Networking Platform serving 20,000+ users.
• CRM System for an Internet Service Provider serving 10,000+ users.
• Built both systems from scratch using Laravel.
• Designed application architecture, relational database schemas, REST APIs, and backend business logic.
• Implemented WebSockets and asynchronous processing using Laravel Queues.
• Integrated third-party services and external APIs.
• Optimized SQL queries and overall application performance.
• Managed deployments, production environments, and long-term maintenance.
• Worked directly with stakeholders to translate business requirements into technical solutions.
• Sole backend developer responsible for the complete software development lifecycle, delivering applications serving more
than 30,000 combined users.
Software Development Company June 2020 – September 2021
Backend Software Engineer
• Developed commercial web applications, including e-commerce platforms and online marketplaces.
• Implemented new Laravel features and integrated third-party APIs.
• Maintained production systems and improved application stability and performance.
• Collaborated with developers using Git and participated in code reviews.

Education
Ivan Franko National University of Lviv
PhD in Radio Electronics (2025–Present)
Master’s Degree in Micro- and Nanosystems Engineering (2018–2019)
Bachelor’s Degree in Micro- and Nanoelectronics (2014–2018)

Languages
Ukrainian — Native
English — B2