During January 2025, Bluegecko contributed backend enhancements to the somle2005/ruoyi-vue-pro repository, focusing on improving refund reliability and user data integrity. They addressed a bug in the coupon invalidation process by adding null and bounds checks for coupon IDs, reducing runtime errors during refunds. Additionally, Bluegecko enhanced username validation by updating the regular expression to enforce stricter alphanumeric requirements, preventing invalid entries. Their work demonstrated defensive programming practices and careful validation using Java, with clear commit-level traceability. These targeted improvements aligned with business goals by reducing support incidents and strengthening operational stability, reflecting a focused and methodical engineering approach.