Олексій

Oleksii Havrylov
[open contact info](look above in the "contact info" section) | Kyiv, UA | [open contact info](look above in the "contact info" section)

PHP Backend Developer
Professional Summary
Senior Backend Developer with 8+ years of experience architecting high-load systems, APIs,
and backend services. Deep expertise in PHP and Symfony-based ecosystems, database
optimization, and third-party integrations. Strong focus on SOLID principles, scalable design,
and team collaboration.

Technical Skills
Languages: PHP, JavaScript, SQL, Go, Rust, Elixir
Frameworks: Symfony, Phalcon, Zend Framework
CMS / E-commerce: Shopware 6, Magento 2
Databases: PostgreSQL, MySQL, Redis
DevOps & CI/CD: Docker, GitHub Actions, GitLab CI, Bitbucket Pipelines
Architecture & Practices: REST API, OOP, SOLID, Design Patterns, PHPUnit, High-Load
Optimization
Tools: Git, AI Tools, CLI Development

Professional Experience
Senior PHP Magento Developer
Overdose, Kyiv, Ukraine | Aug 2020 – Mar 2026

●​ Designed backend for high-traffic e-commerce platforms handling 50k+ daily
transactions, ensuring 99.9% uptime during peak loads.
●​ Improved application performance by 32% via database indexing, query optimization,
and Redis caching implementation.
●​ Developed custom plugins and modules for Symfony-based platforms (Shopware 6),
extending core functionality for B2B and B2C workflows.
●​ Designed and maintained 15+ REST API integrations with external services (ERP,
CRM, payment gateways, marketing automation), reducing data sync latency to near
real-time.
●​ Established CI/CD pipelines in GitHub Actions and containerized development
environments with Docker.
●​ Mentored mid-level developers and conducted code reviews to enforce code quality
and architectural standards.

Go Developer (Contract)
Bridge.Digital, Kyiv, Ukraine | Apr 2024 – Jul 2024

●​ Built a CLI application for an open-source database anonymization platform, enabling
secure data sharing across development environments.
●​ Implemented efficient data-processing pipelines in Go, ensuring compatibility with
PostgreSQL and MySQL dump formats.
 ●​ Delivered a lightweight, production-ready tool with focus on security, speed, and
cross-platform usability.

PHP Backend Developer
Web4PRO, Kharkiv, Ukraine | Oct 2018 – Nov 2021

●​ Developed and maintained backend services for multiple client projects,
implementing custom PHP modules and business logic extensions.
●​ Built reusable internal libraries and modular architecture components, reducing
development time for new features across the team.
●​ Integrated third-party APIs and external services into existing applications, ensuring
reliable data exchange and error handling.
●​ Collaborated with frontend teams to design and document REST API endpoints for
web applications.
●​ Maintained code quality through refactoring, code reviews, and adherence to OOP
and SOLID principles.

Open Source Projects
Marketing Automation Plugin — Shopware 6
Developed a plugin integrating Symfony-based e-commerce platform with marketing
automation APIs via REST. Implemented event-driven architecture for real-time customer
data synchronization.
VeilDB Client
Created a lightweight CLI application in Go for securely downloading and handling
anonymized database dumps.
Web Performance Module
Participated in a backend optimization module improving Core Web Vitals through advanced
caching and lazy-loading strategies.

Education
Master's Degree in Automation and Computer-Integrated Technologies
Ukrainian State University of Railway Transport, Kharkiv, Ukraine | Sep 2001 – Jun 2006

Languages
English — Proficient
Ukrainian — Native / Bilingual
Russian — Native / Bilingual