Worked on the openssl/openssl repository to deliver Subject Alternative Name (SAN) support in the mkcert.sh script, enhancing certificate generation to align with modern TLS standards. Addressed the absence of subjectAltName in issued certificates, which improved compatibility across clients and reduced certificate-related errors for users. The solution involved shell scripting and certificate management, integrating SAN handling directly into the certificate creation workflow. Participated in code reviews and collaborated with peers to ensure code quality before merging the changes. Demonstrated a strong understanding of X.509 SAN requirements and contributed to the OpenSSL patch process through end-to-end feature delivery.