In April 2025, Berk Balci enhanced X.509 certificate handling in the indigo-iam/iam repository by expanding support for DER-encoded and URL-encoded PEM certificates. He refactored the Java backend’s certificate parsing logic to improve robustness and compatibility with client certificates delivered through Nginx and HAProxy. This work addressed authentication edge cases and improved interoperability across common ingress proxies, strengthening the security posture of the authentication pipeline. By accommodating a broader range of certificate formats, Berk’s engineering efforts in backend development and security enabled more reliable deployments and reduced friction for clients integrating with diverse certificate representations in production environments.