Contributed to backend development in Go, focusing on reliability and maintainability across two major repositories. In itchyny/go, addressed a resource leak risk by implementing a deferred closure for output metadata files, ensuring robust file handling and improving data integrity within covdata workflows. This change enhanced system stability and reduced the likelihood of metadata corruption in data pipelines. Later, in golang/go, improved code clarity by correcting a comment typo in the QUIC connection handling logic within the crypto/tls package. These contributions demonstrated disciplined use of Go’s file I/O best practices and a commitment to maintainable, well-documented backend systems.