Kitoha focused on backend reliability and maintainability across the apache/lucene and apache/gravitino repositories, addressing four critical bugs in July 2025. He streamlined the Lucene API by deprecating an unused method, guiding users toward more consistent usage patterns. In Gravitino, he improved SQL generation logic to ensure table properties were applied only once, enhancing data integrity. Kitoha also resolved internal registry inconsistencies and modernized IO handling in GCSTokenProvider using Java NIO and robust error handling. His work, leveraging Java, SQL, and code refactoring skills, resulted in cleaner APIs, reduced resource leaks, and steadier production performance for cloud storage and database systems.