Worked on the expressvpn/wolfssl-rs repository to improve the reliability and performance of DTLS 1.3 handshakes by addressing fragmentation issues. Focused on system programming and network protocols using C and Rust, the developer delivered a targeted bug fix that lowered the maximum MTU for handshake messages in dtls13.c. This adjustment reduced handshake fragmentation, resulting in more stable client connections and fewer failures during the handshake process. Additionally, the build system was updated to ensure accurate MTU calculation, further enhancing handshake reliability. The work contributed to smoother user experiences and reduced the need for retry logic across DTLS client deployments.