Worked on the apache/gravitino repository to enhance code quality and maintainability in backend systems using Java. Centralized the retrieval of parent entity IDs within CommonMetaService and introduced a dedicated SchemaCommandHandler to streamline CLI schema command management, reducing code duplication and simplifying future extensions. Addressed a logging issue in IcebergMetricsManager by correcting the logger class usage, which improved observability and ensured accurate metrics reporting. Focused on backend development, CLI tooling, and refactoring, these contributions improved reliability and diagnostics while lowering maintenance overhead, enabling safer and more efficient future enhancements to the codebase through thoughtful structural improvements and targeted bug fixes.