Dohun Kim developed tagging capabilities for Bigtable instances in both the googleapis/java-bigtable and googleapis/google-cloud-go repositories, enabling resource organization and cost tracking through tag support in instance creation and retrieval flows. Using Go and Java, Dohun extended API surfaces to persist tags and implemented comprehensive tests to ensure reliability and governance. In addition, Dohun upgraded the Bigtable client dependency in GoogleCloudPlatform/magic-modules from v1.42 to v1.46, aligning with the latest API changes and improving stability. The work demonstrated depth in backend development, dependency management, and testing, focusing on maintainability and traceable change management across multiple codebases.