Wouter Legiest developed end-to-end LUT4 support for the google/heir repository, enabling 4-input lookup table configurations within the Yosys and CGGI dialects. He updated the emitter logic and stabilized LWE type generation using C++ and MLIR, ensuring the synthesis pipeline could handle both LUT3 and LUT4 paths. Wouter expanded and enhanced the test suite in Python to cover new selector logic, focusing on regression safety and robust behavior. His work increased the configurability and reliability of programmable logic synthesis, allowing for faster hardware design cycles and more flexible hardware configurations, demonstrating depth in both front end and full stack development.