Sen Yang worked on backend development for the flashbots/rbuilder repository, focusing on expanding MEV Boost compatibility by integrating the Titan relay. Using Rust, Sen extended the relay enum, updated the relay constants array, and enhanced the mapping of relay names and URLs, enabling the MEV Boost system to recognize and utilize the new Titan relay. This addition broadened the network reach and improved relay support within the system. Over the course of the month, Sen concentrated on feature development rather than bug fixes, demonstrating depth in backend systems and protocol integration while leveraging expertise in Rust and MEV Boost technologies.