Worked on enhancing the reliability of health checks in the kubernetes/node-problem-detector repository, focusing on improving compatibility across IPv4 and IPv6 environments. Addressed a bug by defaulting the health check host to localhost, ensuring consistent behavior regardless of network configuration. Refactored endpoint construction to utilize Go’s net.JoinHostPort, which provides robust handling of host and port assembly for backend services. This update reduces the risk of health-check misreporting and streamlines deployments in mixed network clusters. The work demonstrated backend development and networking skills, with all changes implemented in Go and tracked in a single, well-documented commit during the project period.