Serhii

SERHII PROFESSIONAL SUMMARY
Senior Full-Stack WordPress & WooCommerce Developer with 9+ years of
REZUNENKO experience building custom, scalable solutions. Specialized in WooCommerce
architecture, custom plugins and themes, PHP/MySQL, REST APIs, WP-CLI, third-
Senior Full-Stack party integrations, payment and shipping solutions, and large-scale data
WordPress & processing. Experienced in owning projects from architecture and development
through performance optimization, deployment, and production support.
WooCommerce Developer

[відкрити контакти](див. вище в блоці «контактна інформація») SELECTED ACHIEVEMENTS
[відкрити контакти](див. вище в блоці «контактна інформація»)
Delivered 20+ custom WooCommerce solutions and 10+ WordPress plugins,
Ukraine addressing complex business requirements, integrations, and workflow
[відкрити контакти](див. вище в блоці «контактна інформація») automation.
Developed 50+ custom WordPress themes with reusable components,
WordPress APIs, and Gutenberg/ACF-based solutions.
Built and optimized large-scale WooCommerce platforms with 400K+
SKILLS products and 2M+ variations, focusing on scalability, database performance,
and reliable data processing.
Core Expertise
Implemented enterprise integrations with REST APIs, ERP/CRM systems,
WordPress Development payment gateways, shipping providers, and large-scale data synchronization
WooCommerce Development workflows.
Full-Stack Development Improved WordPress and WooCommerce performance through
Custom Plugin Development PHP/MySQL, database and query optimization, caching, and background
Custom Theme Development processing.
REST API Development

Backend WORK EXPERIENCE
PHP Senior Full-Stack WordPress Developer
MySQL
P2H
Object-Oriented Programming
Dec 2020 - Present Ukraine
(OOP)
Promoted to Senior Full-Stack WordPress Developer after one year based on
WordPress APIs
technical expertise, project ownership, and consistent delivery of complex
WordPress Hooks (Actions & Filters) solutions.
Third-Party API Integrations Lead development of complex WordPress and WooCommerce applications,
Database Optimization making architectural and technical decisions focused on scalability,
Composer maintainability, performance, and reliability.
WP-CLI Design and implement custom WooCommerce functionality, including
Timber / Twig business logic, product and order workflows, custom checkout, pricing,
shipping, and payment integrations.
Develop scalable custom WordPress plugins using PHP, OOP, WordPress APIs,
Frontend hooks, filters, modular architecture, reusable components, and third-party
JavaScript integrations.
jQuery Build and maintain integrations with REST APIs, ERP/CRM systems, payment
AJAX gateways, and shipping providers, including Stripe, PayPal, UPS, and FedEx.
HTML5 Design and implement large-scale import, migration, and catalog
management workflows using PHP, WP-CLI, WP All Import, ACF PRO, XML/CSV
CSS3
processing, JavaScript, and AJAX.
SASS / SCSS
Implement automation and background processing for resource-intensive
Responsive Web Design operations, improving the reliability and scalability of large catalog and
synchronization workflows.
WooCommerce & Integrations Troubleshoot and optimize production systems across PHP, MySQL,
Payment Gateway Integration WordPress, WooCommerce, APIs, and frontend layers, resolving complex
technical and performance issues.
Shipping Integrations
Participate in code reviews, technical decision-making, architecture
ERP / CRM Integrations discussions, and mentoring junior developers, promoting scalable and
WPML maintainable development practices.

WP All Import
Middle Full-Stack WordPress Developer
Custom Import & Migration
Solutions P2H
Nov 2019 - Dec 2020 Ukraine
Developed custom WordPress and WooCommerce solutions for complex
Page Builders business requirements and site-specific functionality.
Elementor
Built custom WordPress themes and plugins using PHP, Hooks, APIs, and
Bricks established development practices.
WPBakery Customized WooCommerce checkout, product, pricing, and order workflows;
Beaver Builder developed frontend functionality with JavaScript, jQuery, and AJAX.
Maintained and enhanced existing WordPress applications by troubleshooting
issues and implementing new features.
Development & Quality
Collaborated with designers, developers, and project managers to deliver
Performance Optimization
production-ready solutions.
Technical SEO
Debugging & Troubleshooting
Code Review Middle Full-Stack WordPress Developer
Git Hyperion Tech
Jira Dec 2018 - Nov 2019 Kharkiv, Ukraine
Agile / Scrum Developed custom WordPress websites, themes, plugins, and business
functionality using PHP, MySQL, JavaScript, and WordPress APIs.
Built XML/JSON data-processing solutions and integrated external APIs to
automate data synchronization and business workflows.
LANGUAGES
Collaborated with designers, developers, and project managers in Agile/Scrum
English - Upper-Intermediate (B2) teams to deliver production-ready web solutions.
Ukrainian - Native

Frontend Developer
Hyperion Tech
EDUCATION
Aug 2018 - Dec 2018 Kharkiv, Ukraine
Master's Degree in Agricultural Developed responsive web interfaces using HTML5, CSS3, JavaScript, and
Science and Food Technology jQuery.
State Biotechnological University Converted design concepts into responsive, cross-browser-compatible
2022 - 2023 frontend implementations.
Kharkiv, Ukraine Collaborated with designers and backend developers to deliver performant
and maintainable interfaces.
Optimized frontend code and improved implementation quality across web
Specialist Degree in Construction projects.
Engineering and Materials
Technology
Kharkiv National University of
Frontend Developer
Civil Engineering and i3DESIGN Co., Ltd.
Architecture May 2017 - Aug 2018 Kharkiv, Ukraine
2010 - 2015 Developed responsive websites and WordPress-based projects using HTML5,
CSS3, JavaScript, and jQuery.
Kharkiv, Ukraine
Implemented AMP solutions to improve mobile web performance.
Optimized frontend code and participated in interviewing and mentoring
junior frontend developers.

Frontend Developer
InnoInco
Oct 2016 - May 2017 Kharkiv, Ukraine
Developed responsive e-commerce websites using Miva Merchant and
WordPress.
Built and customized responsive WordPress themes using HTML5, CSS3,
JavaScript, and jQuery.