Gabriel Viera developed three user-facing features across two repositories, focusing on property discovery and API reliability. In the thriftuni project, he implemented a JavaScript-based fuzz testing script to exercise listings and sellers endpoints, enhancing backend robustness through automated error detection. For the condo-rentals repository, Gabriel built an area-based property listings API in TypeScript and Express.js, supporting area validation, selective field querying, and result limiting to streamline data access. He also introduced a trusted landlords feature, refactoring the backend data layer and integrating a React Native UI to display landlord profiles, thereby improving both technical quality and user experience.