Worked on the Ferrocene project to enhance the reliability and safety of trait-based designs in Rust by addressing a subtle validation issue in the Reborrow trait. Focused on compiler development, the work involved modifying the reborrow_info logic to ensure every field of a struct implementing Reborrow is properly validated, preventing incorrect trait implementations when later fields fail required constraints. Added a regression test to the ferrocene/ferrocene repository to confirm comprehensive field compliance, reinforcing long-term maintainability. Demonstrated a test-driven approach and strong debugging skills, with an emphasis on correctness and stability in Rust trait systems and compiler infrastructure.