Worked on the prometheus/node_exporter and prometheus/alertmanager repositories, focusing on performance, maintainability, and reliability in Go-based network and system programming. Delivered ARP collector optimizations by refactoring to a higher-level rtnetlink wrapper and introducing an internal cache, which reduced system calls and improved scalability while preserving metrics accuracy. Enhanced TCP statistics collection by replacing a third-party endianness helper with Go’s standard binary.NativeEndian, simplifying the codebase and improving cross-platform robustness. In prometheus/alertmanager, updated CA certificate test data to reduce TLS-related test fragility and added human-readable x509 certificate outputs, demonstrating skills in Go, certificate management, and security-focused test engineering.