Jonathan Senning contributed to the gordon-360-ui repository by developing and refining features that enhance academic term progress tracking and user interface clarity. He improved the accuracy of term calculations and the DaysLeft logic, ensuring that users receive reliable, dynamically updated progress indicators. Jonathan also updated onboarding documentation to streamline frontend setup, addressing dependency installation and port conflict resolution. His work involved maintainability-focused refactoring, particularly in session code handling, and UI content polish, such as updating button text and About page content. Throughout, he utilized JavaScript, React, and TypeScript, demonstrating a methodical approach to both user experience and code quality.