Felix Monninger enhanced the esrlabs/openbsw repository by implementing flexible Ethernet support in the transport router, enabling conditional routing for CAN and SELFDIAG buses even when Ethernet is disabled. Using C++ and CMake, Felix applied conditional compilation to add configurability and prevent build failures in projects lacking Ethernet support. He improved build stability by removing an unused DoIP include and replacing estd::array with etl::array, ensuring compatibility across toolchains. This work reduced maintenance overhead and increased portability for embedded systems with multi-bus configurations, demonstrating a strong grasp of system programming and practical solutions for cross-bus deployment scenarios.