Worked on the keycloak/keycloak repository to address a critical defect in SAML client creation, specifically targeting failures when client IDs contained special characters. The solution involved removing reliance on RFC 2253 DN string parsing and introducing explicit Relative Distinguished Name (RDN) builders for certificate generation, improving the robustness of identity handling across providers. Regression tests were added to ensure that subjects with special characters would be handled correctly in future updates. This work, utilizing Java, cryptography, and unit testing, enhanced the reliability and security of SAML integration, aligning the project with production readiness and supporting ongoing stability goals.