Worked on security and reliability improvements across kamailio/kamailio, lima-vm/lima, and moby/moby, focusing on backend development and systems programming in Go and C. Delivered multipart boundary hardening and memory-safety enhancements in Kamailio, addressing heap overflows and parsing vulnerabilities through strict bounds checks and fuzzing. In Lima, improved port-forwarding tunnel read handling by introducing buffering and comprehensive unit tests, and fixed SSH public key detection to prevent out-of-bounds access. Addressed directory permission issues in Moby by aligning trust directory permissions with security models. Emphasized robust security engineering, memory management, and thorough testing to ensure resilient and maintainable codebases.