Worked on the Maintainerr repository to enhance backend reliability and data safety for automated episode management. Developed a new episode ranking engine using Node.js and TypeScript, introducing series-based scoping, memoization for daily-series performance, and time-zone aware air date handling. Implemented a safer deletion workflow that verifies file status before unmonitor or delete actions, especially under slow network conditions, using robust API integration and batch processing tolerant of individual failures. Expanded unit test coverage with Jest to validate ranking logic and deletion paths, reducing risk of data loss and ensuring consistent, reliable operations during long-running automated maintenance tasks.