Worked on the google/ground-platform repository to deliver a real-time user profile refresh feature triggered by ID token changes. Leveraging Angular and Firebase Authentication, the developer implemented an onIdTokenChanged-driven mechanism that ensures user profile data remains current whenever authentication tokens rotate. The approach introduced a dedicated TokenChangeSubject to centralize token-change events and merged it with the existing authentication state observable, creating a unified and reliable data flow. Using JavaScript and TypeScript, the work focused on improving authentication reliability and data consistency across sessions, addressing potential stale-profile scenarios and enhancing the overall front end experience without introducing new bug fixes that month.