Artjom Lupjak

Frontend Developer

Booking.com • Freelance

Oct 2016 - Jan 2018 • 1 yr 3 mos

Collaborated with the performance marketing and UI/UX teams to implement and scale high-traffic A/B tests on the core search and booking funnel. Focused on optimizing front-end performance and ensuring a seamless experience for a global audience across 40+ languages. Refactored legacy UI components into a modern, modular library, which improved page load speeds by 20% and helped maintain a consistent brand across various localized versions of the site. Conversion Rate Optimization (CRO), accessibility (WCAG), and building highly resilient components that perform under massive server load.

Frontend Developer

Nike • Freelance

Dec 2016 - Dec 2017 • 1 yr

Developed high-impact, responsive web components for Nike’s global e-commerce platform and seasonal campaign landing pages. Worked on optimizing the front-end for speed and seamless user transitions during major product drops. Built interactive storytelling modules for the "Running" and "Basketball" categories, ensuring a premium brand experience across all device types. React, GSAP (for animations), Tailwind CSS, and headless CMS integrations. Contributed to a 10% increase in mobile conversion rates by refactoring the checkout UI and improving page load speeds.

Frontend Developer.

Cisco • Full time

Dec 2014 - Dec 2017 • 3 yrs

Built and scaled responsive front-end components for Cisco's communications equipment interfaces. Collaborated in an Agile environment to deliver high-quality code, conduct peer reviews, and ensure seamless integration with back-end microservices. Focus: Data visualization, component-based architecture, and accessible (WCAG) web design.