Eric Zhou contributed to the WATonomous/humanoid repository by architecting a modular ROS 2 navigation stack, refactoring legacy components into discrete nodes for mapping, planning, and state management using C++ and CMake. He developed a costmap module that processes sensor data into occupancy grids, enabling robust robot navigation. Eric improved developer onboarding by streamlining Docker-based environment setup and enhancing shell scripts for reliability and usability. His work emphasized maintainability and scalability, laying a foundation for future autonomy features. Throughout, he demonstrated depth in software architecture and CI/CD practices, focusing on clear interfaces, documentation hygiene, and stable development workflows without introducing user-facing bugs.