Worked on the keycloak/keycloak repository to enhance the robustness of JWK handling in backend authentication flows. Focused on improving token processing reliability by correcting thumbprint computation for both RSA and EC key types, introducing explicit handling for unsupported key types, and adding targeted test coverage for EC keys. Utilized Java to normalize JWKs to JSON before extracting public key parameters, ensuring consistent mapping of RSA and EC subtypes to PublicKey objects. These backend development efforts addressed key parsing failures, improved interoperability with identity providers, and strengthened cryptographic key management, resulting in more reliable and secure authentication infrastructure for the project.