Worked on improving session management stability in the keycloak/keycloak repository by addressing a critical NullPointerException risk within the session lifecycle. Refactored the codebase to use Java’s Optional for null checks, ensuring more robust handling of potential null values and enhancing reliability for deployments dependent on Keycloak. Validated the solution against related issues to confirm backward compatibility and integrated the changes with existing CI checks for seamless adoption. Demonstrated skills in API development, Java, and back end development while maintaining strong code hygiene and traceability through clean commits, ultimately delivering a targeted bug fix that improved session management reliability.