Developed a WireGuard VPN Demo Application for the nxp-upstream/zephyr repository, focusing on enabling VPN interface creation and peer connection testing within embedded systems. Leveraging C programming and network programming skills, the work included host-side setup scripts and configuration templates to streamline VPN testing on native-sim boards. This approach established a reproducible, end-to-end workflow for VPN connectivity, enhancing both developer onboarding and the speed of network testing. The changes were delivered as clear, testable commits with a focused scope, providing a practical solution for evaluating VPN functionality on Zephyr platforms without addressing major bug fixes during the period.