Sunny S. developed and integrated TLS Pre-Shared Key (PSK) authentication into the Netflix/zuul core, focusing on enhancing secure client-server communication. By leveraging Java and Gradle, Sunny introduced Bouncy Castle TLS components and implemented PSK handshakes within the Netty pipeline, providing an alternative authentication mechanism that supports both security and efficiency. This work established end-to-end security tooling readiness and laid the groundwork for broader deployment and performance testing. The feature addressed the need for flexible authentication pathways in backend systems, demonstrating depth in backend development, network security, and protocol integration within a large-scale, production-grade Java service environment.