Worked on the evcc-io/evcc repository to enhance the reliability of OAuth authentication by addressing a deadlock risk in the online-status handling logic. Focused on backend development using Go, the work involved implementing a non-blocking send path for online status updates within the OAuth control loop, which reduced the risk of authentication-related outages. The OAuth status handling was refactored to simplify the control flow, making the system more maintainable and paving the way for future asynchronous improvements. This effort resulted in a more robust authentication flow, minimizing potential downtime for OAuth sessions and improving overall system stability without introducing new features.