Over a two-month period, contributed to bt-Unialex/TeamProjectPG7-GreenHarvest and Ilona-Chorniy/ArtistsHub by delivering five new features focused on frontend experience and maintainability. Work included building a mobile-first navigation system, optimizing site-wide images, and refining the hero section for responsive design using HTML, CSS, and JavaScript. On ArtistsHub, implemented automated dependency updates with Dependabot and developed a robust user feedback modal featuring validation and accessibility improvements. Emphasized asset optimization, UI/UX design, and dependency management to enhance performance, security, and user satisfaction. The approach prioritized maintainable code, accessibility, and seamless user interactions across devices without introducing new bugs.