• Managed the migration to a new corporate payment system, which improved the transaction success rate by 1.78%. • Implemented a marketing feature to display strikethrough prices for cruises, which resulted in a 0.24% increase in sales. • Took part in transitioning the project from pure React to Next.js with server components. Average page loading time reduced in 2.5 times. • Worked closely with frontend developers to increase test coverage by 40%, covering over 50 user scenarios with Playwright UI tests and writing more than 1300 unit tests using Jest.

Optimised the Next.js application by reducing the initial data load, implementing image and data caching, and minimizing Critical CSS. These improvements boosted SEO and brought key performance metrics like TTI (Time to Interactive) and TTFB (Time to First Byte) in the green range (85-90 depending on the page). • Increased the Download -> Signup conversion by 66% by adding SSO integrations through Facebook, Apple, and Google accounts. • Implemented a media caching mechanism in the app, preventing the loading of an extra 10 MB on the homepage and improving UX in regions without access to high-speed connections; • Authored onboarding materials for the front-end team and took on a mentorship role. I also drove technical innovation by leading the transition to a new version of React, introduction TypeScript across all projects, addressing technical debt, and ensuring key components were covered with tests.