Worked on stabilizing Vault token lifecycle handling within the SAP/jenkins-library repository, focusing on backend development and DevOps practices using Go. Addressed a critical issue where non-renewable Vault tokens previously triggered unnecessary retry loops, leading to error noise and pipeline disruptions. The solution involved updating the token lifecycle manager to log a debug message and exit gracefully when encountering non-renewable tokens, aligning with Vault semantics and improving CI/CD reliability. This change reduced false failures and operator toil, resulting in more predictable authentication behavior across pipelines. Demonstrated effective debugging, logging improvements, and a thoughtful approach to incident response and maintainability.