Worked on security and configuration enhancements for the OpenLiberty/open-liberty repository, delivering features and fixes focused on cryptography, authentication, and compliance. Over six months, implemented secure GCM IV derivation and caching, FIPS 140-3 compliant key management, and WS-Security profile hardening using Java, XML, and properties files. Addressed audit encryption algorithm selection, improved LTPA key password handling, and refined OAuth PKCE enforcement. Prioritized robust test coverage with JUnit and Jakarta EE 9 compatibility, reducing flaky tests and improving CI reliability. The work emphasized secure coding practices, maintainable configuration management, and alignment with security standards to reduce risk and support production readiness.