Worked on the hectorqin/hyperf repository to enhance the reliability of the caching layer by addressing a bug in the Hyperf Cache Memory Driver. Focused on backend development using PHP, the contribution involved correcting the default Time-To-Live (TTL) handling to ensure cache entries expire as intended and refining key existence checks to prevent edge-case failures. This targeted patch improved data freshness and reduced cache-related outages, resulting in greater stability under load. The work demonstrated proficiency in PHP, caching architecture, and patch-based debugging, aligning with engineering best practices and contributing measurable stability gains to the Hyperf framework’s caching subsystem.