During April 2025, R.C.V. Schaik focused on backend development for the google-deepmind/torax repository, addressing stability and correctness in equilibrium calculations. He resolved a type mismatch in the vacuum_toroidal_field component by ensuring the b0 field was explicitly handled as a NumPy array, resizing it to hold a single element and initializing it from geometry.B0. This targeted bug fix improved the robustness and data-model integrity of the torax pipeline, reducing the risk of type-related failures. Working primarily in Python, R.C.V. Schaik maintained high code quality and traceability through clear commit messages and precise, well-scoped engineering changes.