Worked on the pion/webrtc repository to enhance test reliability and media engine robustness, focusing on backend improvements rather than feature development. Addressed two persistent bugs by introducing Go channels to coordinate PeerConnection establishment, ensuring tests consistently reach the connected state and reducing flakiness in automated test suites. Improved codec handling by implementing case-insensitive MIME type comparisons, which prevents incorrect codec registrations and strengthens cross-platform consistency for codecs such as RTX and FlexFEC. Leveraged expertise in Go, RTP, and WebRTC to deliver changes that streamline continuous integration, accelerate pull request validation, and simplify ongoing maintenance for the media engine codebase.