Worked on improving backup history retrieval reliability and performance within the apache/hbase repository, focusing on the Backup subsystem. Addressed a bug that restored correct ordering for backup history, ensuring the most recent backups are displayed first. Merged and optimized retrieval methods to streamline access and enhance performance, while also extending and refactoring automated tests to verify correct behavior. The work included mitigating a potential exception risk, clarifying API documentation, and improving maintainability for backup administration workflows. Utilized Java for backend development, applied code refactoring techniques, and emphasized robust testing practices to deliver a more reliable and efficient backup management experience.