Shopper worked on the kubernetes/kubernetes repository, focusing on improving the reliability of resource lifecycle management for PodCertificateRequest objects. They addressed a bug in the OwnerReference APIVersion, ensuring that PodCertificateRequests are properly garbage collected when their owning Pod is deleted. Using Go and Kubernetes API conventions, Shopper implemented a fix that corrected the APIVersion from core/v1 to v1 and reinforced this change by adding targeted assertions in the test suite. Their work demonstrated a strong understanding of backend development and Kubernetes resource ownership, resulting in more robust automation of cleanup processes and reducing the risk of orphaned resources in production environments.