Worked on the golang/go repository to enhance security-critical aspects of TLS verification, focusing on a bug fix for IPv6 zone-scoped address handling in certificate hostname verification. Addressed the issue by leveraging Go’s netip package for zone-aware IP parsing and using AsSlice to compare zone-free representations, which prevents incorrect DNS-name fallback and ensures accurate IP-based SAN matching in edge cases. Collaborated closely with core maintainers through rigorous code review and automated CI validation. Demonstrated backend development, network programming, and security skills while improving the reliability of Go’s crypto/x509 TLS verification across diverse production environments and deployment scenarios.