Worked on the music-assistant/server repository to enhance authentication security by addressing a vulnerability in JWT token handling. Focused on backend development using Python, the work involved implementing strict validation of the return_url parameter before appending JWT tokens, ensuring that tokens are only issued to trusted destinations. This approach reduced the risk of token leakage across integrations and aligned the authentication flow with established security best practices. The update did not introduce new features but delivered a targeted bug fix that strengthened the system’s overall security posture, demonstrating a methodical approach to web development and secure backend engineering within the project.