Worked on hardening protocol implementations in the pion/ice and pion/webrtc repositories, focusing on security, standards compliance, and test coverage. Addressed critical bugs in Go, improving STUN message integrity by ensuring correct attribute ordering and capping DTLS-in-STUN ACK list decoding to prevent oversized lists. Enhanced regression testing to validate these changes, increasing protocol robustness and reducing deployment risk. In pion/webrtc, implemented RFC 8843-compliant startup behavior for bundle-only data channels, aligning SCTP initialization with specification requirements. The work demonstrated depth in network programming and testing, delivering targeted improvements that strengthened protocol correctness and interoperability in real-world WebRTC scenarios.