Worked on backend reliability and security for helm/helm and derailed/cilium, focusing on targeted bug fixes and configuration improvements. Addressed a critical security vulnerability in helm/helm by upgrading the golang.org/x/net dependency to v0.33.0, mitigating CVE-2024-45338 and enhancing the project’s security posture while maintaining compatibility. In derailed/cilium, improved configuration management by removing deprecated single-CIDR checks and enforcing list-based CIDR options, aligning with updated schemas to reduce misconfiguration risks during upgrades. Utilized Go and YAML for dependency and configuration management, demonstrating a methodical approach to maintaining secure, reliable infrastructure in Kubernetes environments through precise, reviewable code changes.