Serhii

SERHII PROFESSIONAL SUMMARY
Senior Full-Stack WordPress & WooCommerce Developer with 9+ years of
REZUNENKO experience building scalable e-commerce platforms, custom WordPress
applications, and business-critical web systems. Specializing in custom plugin
Senior Full-Stack development, WooCommerce customization, REST API development, third-party
WordPress & integrations, payment and shipping systems, and performance optimization.
Proven ability to take ownership of the full software development lifecycle, from
WooCommerce Developer architecture and implementation to optimization and long-term maintenance.
Skilled at solving complex technical challenges, improving system scalability,
reducing technical debt, and delivering reliable solutions.
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Ukraine
KEY ACHIEVEMENTS
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Delivered 20+ custom WooCommerce solutions, designing scalable business
logic, integrations, and tailored functionality for complex business
requirements.
SKILLS Developed 50+ custom WordPress themes and implemented scalable
functionality using custom plugins, REST APIs, and WordPress core
Core Expertise functionality.
WordPress Development Designed and implemented 10+ scalable custom WordPress plugins using
WooCommerce Development modular architecture, reusable components, and third-party service
Full-Stack Development integrations.
Custom Plugin Development Built enterprise-level WooCommerce solutions supporting large product
catalogs, custom pricing logic, payment gateways, shipping services, and
Custom Theme Development
ERP/CRM integrations.
REST API Development
Developed custom XML/CSV processing and migration solutions, automating
WooCommerce catalog management and large-scale data synchronization
Backend workflows.
PHP Optimized application performance through backend optimization, database
tuning, code refactoring, and frontend performance improvements.
MySQL
Mentored junior developers, conducted code reviews, and established
Object-Oriented Programming
WordPress/PHP engineering best practices across development teams.
(OOP)
WordPress APIs
WordPress Hooks (Actions & Filters)
Third-Party API Integrations WORK EXPERIENCE
Database Optimization
Senior Full-Stack WordPress Developer
Composer
P2H
WP-CLI
Dec 2020 - Present Ukraine
Promoted to Senior Full-Stack WordPress Developer after one year based on
Frontend technical expertise, project ownership, and consistent delivery of complex
JavaScript WordPress solutions.
jQuery Led the development of enterprise-level WordPress and WooCommerce
AJAX solutions, making architectural decisions focused on scalability,
maintainability, and performance.
HTML5
Delivered custom WooCommerce solutions, implementing complex business
CSS3
logic, integrations, and business-specific functionality.
SASS / SCSS
Designed scalable WordPress plugins, REST APIs, and third-party integrations
Responsive Web Design to automate complex business workflows.
Developed payment gateway and shipping integrations with Stripe, PayPal,
WooCommerce & Integrations UPS, and FedEx, including custom checkout logic.
Payment Gateway Integration Improved application performance through PHP optimization, database
Shipping Integrations tuning, and frontend improvements.
ERP / CRM Integrations Built custom import, migration, and administration solutions using WP All
Import, ACF PRO, PHP, JavaScript, and AJAX.
WPML
WP All Import
Page Builders Middle Full-Stack WordPress Developer
Elementor
P2H
WPBakery Page Builder
Nov 2019 - Dec 2020 Ukraine
Beaver Builder
Developed custom WordPress and WooCommerce solutions, implementing
Bricks Builder business-specific functionality.
Built custom themes and plugins using WordPress Hooks, APIs, and coding
Development & Quality best practices.
Performance Optimization Customized WooCommerce checkout, product, and order workflows.
Technical SEO Developed interactive frontend functionality using JavaScript, jQuery, and
AJAX.
Debugging & Troubleshooting
Code Review Maintained and enhanced existing projects by troubleshooting issues and
implementing new features.
Git
Jira
Agile / Scrum Middle Full-Stack WordPress Developer
Hyperion Tech
Dec 2018 - Nov 2019 Kharkiv, Ukraine
LANGUAGES Developed custom WordPress websites, themes, plugins, and business
functionality using PHP, MySQL, JavaScript, and WordPress APIs.
English - Upper-Intermediate (B2)
Built XML/JSON data processing solutions and integrated external APIs to
Ukrainian - Native
automate data synchronization.
Russian - Native
Customized and optimized WordPress projects, improving performance,
maintainability, and user experience.
Collaborated within Agile/Scrum teams with designers, developers, and
EDUCATION project managers to deliver high-quality solutions.

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

Frontend Developer
InnoInco
Oct 2016 - May 2017 Kharkiv, Ukraine
Developed e-commerce websites using Miva Merchant and WordPress.
Built responsive interfaces and customized WordPress themes.
Resolved frontend issues and collaborated with designers and developers.