During December 2024, Amrein focused on enhancing the stability and cross-platform reliability of the wasmerio/wasmer repository. He addressed a critical build issue affecting 32-bit targets by safely casting the length of an internal map to u64 before comparison, preventing usize overflow and ensuring correct behavior when usize equals u32. This low-level fix, implemented in Rust, improved the build system’s robustness and supported Wasmer’s portability across constrained environments. Amrein’s work in systems programming demonstrated careful attention to architectural differences, reducing deployment risks for users and contributing to the ongoing effort to make Wasmer reliable on a wider range of platforms.