Oksana Serhiienko

• 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.

• 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 , rebuilding themes for performance, maintainability, and responsive UX. • Implemented complex frontend functionality. • Took over and improved an inherited React and TypeScript, integrated with a WordPress backend powered by NestJS.

• 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.

• 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.