Worked on enhancing the cache subsystem within the Samsung/TizenFX repository, focusing on robustness and debugging improvements using C# and back end development skills. Addressed reliability by introducing safe default initializations to prevent null references and refining code coverage metrics, which strengthened cache reliability and maintainability. Improved the CacheManager component to provide clearer error reporting during download cache size retrieval, facilitating more effective incident response. The work included targeted debugging enhancements and coverage testing refinements, such as excluding non-covered lines and verifying coverage exclusions in debug statements. These changes contributed to more reliable cache operations and streamlined debugging processes within the project.