During April 2026, this developer focused on security hardening within the zephyrproject-rtos/zephyr repository, specifically addressing TLS verification in the HTTP server stack. By removing a hardcoded localhost hostname, they enabled proper server-side peer certificate verification, ensuring that TLS validation now relies on the certificate’s CN or SAN fields rather than static values. This change reduced the risk of hostname mismatches and improved trust in embedded deployments. The work was implemented in C, leveraging network programming and security best practices, and was delivered with minimal code changes and clear commit messaging to maintain performance and compliance with TLS standards.