Joe contributed to both backend and frontend improvements across the codecov/gazebo and codecov/codecov-cli repositories. In codecov-cli, he enhanced the accuracy of coverage reporting by updating Python-based configuration management logic to exclude codecov.yaml from coverage calculations, ensuring more reliable metrics for users. Later, in codecov/gazebo, Joe used TypeScript and React to decommission the Codecov AI UI, removing all related routes and conditional rendering to streamline the user interface and reduce maintenance overhead. His work focused on targeted, minimal changes that addressed specific issues, demonstrating careful attention to codebase stability and maintainability over a two-month period.