Worked on the OpenLiberty/open-liberty repository to deliver reliability improvements for the push notification system, focusing on enhancing robustness and reducing runtime errors in production. Addressed issues related to stale cache and incomplete payloads by implementing null checks, payload normalization, and mapping flat IDs to the nested structures required by the topic utility. Utilized JavaScript, Dojo, and WebSockets to ensure stable push delivery and simplify ongoing maintenance. The work also included a targeted cleanup of pushNotifications.js, removing redundant metadata to streamline the codebase. These changes collectively improved system stability and reduced the likelihood of support incidents related to push notifications.