Over a two-month period, contributed to front-end development across two repositories, focusing on user experience and maintainability. In Dutko-Diana/super-team-project, delivered a dynamic Covers marquee display using HTML, CSS, and responsive design techniques, refining image handling and layout for reliability and visual appeal. For t-matveentsev/project_Lucky7_front, enhanced registration and login flows with mobile-first UI/UX improvements, form validation via Formik, and CSS Modules for consistent styling. Implemented lazy loading and route Suspense wrappers in React to optimize performance, and addressed authentication robustness by improving error handling for session refresh. Work emphasized clean structure, maintainable code, and collaborative iteration.