Worked on reliability and security improvements across the golang/go and golang/net repositories, focusing on backend development and testing using Go. Addressed broken tests in the QUIC test suite by correcting client and server configuration references, which improved the accuracy and stability of QUIC version testing. Updated the cryptography stack in golang/net by upgrading the x/crypto dependency, enhancing security and aligning with current standards. Fixed documentation to improve maintainability and clarity for future contributors. These efforts reduced testing flakiness, strengthened the security posture, and supported faster feedback loops through improved validation processes, contributing to more robust and maintainable codebases.