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OKSANA SERHIIENKO | FRONTEND DEVELOPER

OKSANA SERHIIENKO
Web Developer
Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | LinkedIn | GitHub | Portfolio
WEB DEVELOPMENT | FRONTEND DEVELOPMENT | WORDPRESS | MAGENTO 2 | HTML5 | CSS3 | JAVASCRIPT | PHP |
REACT | RESPONSIVE DESIGN | UI/UX | REST API | GIT | MYSQL | PERFORMANCE OPTIMIZATION | CROSS-BROWSER
COMPATIBILITY

PROFESSIONAL SUMMARY
Frontend / Web Developer experienced in building, redesigning, and maintaining responsive, user-friendly websites and web
applications. Strong hands-on skills in HTML5, CSS3, JavaScript, PHP, WordPress, Magento 2, React, responsive design,
cross-browser compatibility, and frontend performance optimization. Experienced in translating designs into production-ready
interfaces, integrating frontend functionality with backend services, debugging and improving existing applications, and
collaborating with designers, backend developers, and project managers. Strong focus on clean code, usability, performance,
and reliable delivery.
CORE SKILLS
Magento & e-commerce: Magento 2 and 1, Hyvä Theme, Hyvä Checkout, Magewire, Luma, custom themes, theme migrations,
checkout customization, third-party module integration
Frontend: HTML5, CSS3, SCSS, LESS, JavaScript ES6, jQuery, Alpine.js, Tailwind CSS, Knockout.js, RequireJS, XML, responsive
and cross-browser UI; React and TypeScript
WordPress & tools: Custom themes, WooCommerce, Gutenberg, ACF, OxygenBuilder, Elementor, Divi; Git, Figma, Adobe XD,
BrowserStack, Grunt, Gulp, Webpack, Agile/Scrum, estimation, code review

PROFESSIONAL EXPERIENCE
Freelance Magento & Frontend Developer | Feb 2014–Present
Project-based Magento 2, Hyvä, WordPress, and frontend engagements.
• Deliver Magento 2 and WordPress projects from implementation through launch, including assignments that began with
incomplete requirements or limited design coverage.
• Helped complete the DForiginal migration from a React storefront to Magento 2 with Hyvä by clarifying open decisions,
implementing responsive frontend components, resolving migration issues, and supporting delivery.
• Develop and customize Hyvä and Luma storefronts and Hyvä Checkout with Magewire, including custom blocks, checkout-step
changes, additional fields, and business-specific flow adjustments.
• Identify UI, integration, and estimation risks early and propose practical alternatives when design or product-management
support is limited.
• Build and maintain WordPress and WooCommerce websites, including responsive themes, Gutenberg and ACF components,
integrations, debugging, and performance improvements.
Frontend Developer — Magento 2 / Hyvä | Jun 2025–Feb 2026
WDevs, Inc
E-commerce store — consumer electronics and gadgets
• Developed and maintained a Magento 2 storefront using the Luma theme, translating design mockups into responsive layouts
across desktop, tablet, and mobile.
• Customized themes, checkout, product and category pages, CMS content, and frontend components using HTML5, CSS3, LESS,
JavaScript, jQuery, Knockout.js, RequireJS, and XML.
• Improved frontend performance, Core Web Vitals, cross-browser compatibility, and maintainability; tested across browsers and
devices with BrowserStack.
• Collaborated with designers, backend developers, QA engineers, and project managers throughout the development lifecycle.
Frontend Developer — E-commerce | Feb 2023–Sep 2024
FindCanary
• Supported up to four active e-commerce projects, delivering enhancements, bug fixes, responsive improvements, and
performance work while managing frequent context switching.
• Migrated Magento 2 storefronts from Luma to Hyvä for Custom Fabricating & Supplies and JBA Offroad, rebuilding themes for
performance, maintainability, and responsive UX.
• Implemented complex frontend functionality, including product configuration, pricing logic, and dynamic quantity calculations for
multi-piece tile products.
• Took over and improved an inherited React and TypeScript codebase for Fatty's Tattoos, integrated with a WordPress backend
powered by NestJS.

Oksana Serhiienko | 1
 OKSANA SERHIIENKO | FRONTEND DEVELOPER

EARLIER EXPERIENCE
Magento Frontend Developer | May 2019–Nov 2022
Overdose.
• Built custom Magento themes, page templates, and reusable UI components, including menus, sliders, popups, accordions, and
dynamic content.
• Customized checkout experiences with additional fields, static blocks, loading states, and business-specific frontend behavior.
• Resolved styling, compatibility, performance, and merge-related defects; participated in code reviews and coordinated technical
risks with project managers.
Magento & Frontend Developer | May 2017–Jan 2019
SAM Solutions and confidential outsourcing engagements
SAM Solutions: May 2017–Jan 2019; concurrent contract work
• Developed Magento storefronts and custom page templates for retail and e-commerce projects; contributed to architecture,
estimation, sprint planning, demos, and optimization.
• Took over inherited projects, diagnosed frontend defects, and delivered redesign, styling, and custom functional work across
Magento and WordPress.
• Supported and trained junior Magento developers, shared implementation approaches, and reviewed work to reduce avoidable
follow-up fixes.

SELECTED PROJECT EVIDENCE
• DForiginal — React-to-Magento 2 Hyvä migration completed and launched despite incomplete initial requirements and design
coverage.
• Custom Fabricating & Supplies / JBA Offroad — Magento 2 Luma-to-Hyvä migrations across two storefronts.
• Magento 2 multi-project support — Wits End Mosaic, BrainMD, ShelterLogic, and McKay Nursery; frontend enhancements,
checkout and product-page customization, bug fixing, and performance work.
• WordPress builds — VOX Kerrafront, Startup Spokane, PressArch, and Davison + Moore; custom responsive themes,
Gutenberg/ACF components, and interactive UI.
Full project links and detailed case studies: Portfolio

EDUCATION & CERTIFICATION
Certification: Magento Frontend Developer Certification
Education: STEP IT Institute — Frontend and Software Development Studies, 2007–2010; Kharkiv Institute of Banking, 2003–2007;
Interregional Academy of Personnel Management, 2022–2024

LANGUAGES
English — Intermediate | Ukrainian — Native | Russian — Native

Oksana Serhiienko | 2