Tomasz Bajan developed Rustix-based system calls for process priority management and page size retrieval in the uutils/procps repository, migrating these features from libc to Rustix to enhance cross-platform compatibility and performance. His work preserved the existing API while introducing improved error handling, ensuring minimal disruption for downstream users. By resolving Windows build issues related to libc dependencies, Tomasz enabled smoother continuous integration and broader deployment. This migration reduced maintenance overhead and established a foundation for future Rust-based syscall enhancements. Throughout the project, he demonstrated expertise in Rust, cross-platform development, and system programming, delivering robust and maintainable process management functionality.