Worked on the Consensys/teku repository to enhance the stability of P2P IPv6 discovery by addressing a critical issue in UDP port handling. Focused on backend development using Java, the work involved correcting the logic for the --p2p-advertised-udp-port-ipv6 option to ensure the correct variable was used, thereby preventing misrouted values and potential null pointer exceptions. Reinforced the solution with comprehensive unit and regression tests to safeguard against future regressions. This targeted bug fix improved the reliability of peer discovery for IPv6 environments, contributing to more robust service availability and demonstrating a methodical approach to backend problem-solving.