Worked on the roci corp/mono repository to enhance push reliability and IndexedDB resilience using TypeScript and full stack development skills. Developed a mechanism to forward fresh authentication tokens with each push message, prioritizing current tokens to prevent authorization failures while maintaining backward compatibility. Improved the handling of IndexedDB deletion events and tuned logging by downgrading non-critical errors, reducing noise in error monitoring systems. Employed test-driven development to validate new features, adding targeted tests for authentication flows and deletion handling. Ensured cross-browser reliability by verifying the test suite across Chromium, WebKit, and Firefox, supporting robust and secure data synchronization workflows.