Worked on the envoyproxy/envoy repository to deliver two security-focused features over two months, emphasizing robust cryptography and authentication. Developed a cryptographic signing capability for Envoy’s WebAssembly runtime, enabling Wasm modules to generate signatures using private keys, with supporting utilities for key management and comprehensive documentation updates. Later, implemented OAuth2 client TLS mutual authentication, allowing certificate-based client authentication and improved token handling in compliance with RFC 8705. Both features were built using C++, Protocol Buffers, and WebAssembly, with thorough unit testing and documentation to ensure reliability and clarity. The work enhanced Envoy’s security posture and configurability for modern deployments.