Worked on security and reliability improvements for the envoyproxy/envoy repository, focusing on C++ development and robust buffer management. Delivered targeted bug fixes, including a patch to the ext_proc server that prevented the transmission of unexpected ProcessingResponses, addressing a security vulnerability and enhancing runtime reliability. Applied a security-hardening update to TcpStatsdSync, resolving a buffer overflow issue when processing large stats names and mitigating a potential exploit vector. Employed C++, gRPC, and unit testing to validate changes, ensuring no regression in existing workflows. Collaborated through code reviews and security sign-offs, contributing to safer, more stable Envoy deployments in production environments.