What if your deep knowledge of formal mathematics could directly shape how the most advanced AI systems in the world reason, prove, and think?

This is a fully remote, flexible contract role working at the intersection of pure mathematics, logic, and cutting-edge AI research. If you live and breathe formal proof — and especially if you know your way around Lean 4 — this is a rare opportunity to do deeply meaningful technical work on your own schedule.

Why Join Us

• Work on frontier AI research alongside the world's leading AI labs and research teams.
• Fully remote and flexible — structure your work around your life, not the other way around.
• Freelance autonomy with the intellectual depth of meaningful, high-stakes technical work.
• Contribute directly to formal mathematical libraries that will outlast any single project.
• Gain rare exposure to how cutting-edge large language models are built and trained.
• Potential for ongoing work and contract extension as new projects launch.

• Formalize advanced mathematical arguments and theorems in Lean 4, spanning a wide range of mathematical disciplines.
• Contribute to the growth and quality of large-scale formal mathematical libraries, including mathlib.
• Construct clean, readable, and well-structured formal proofs that translate informal mathematical reasoning into rigorous machine-checkable form.
• Audit and verify existing formal proofs for correctness, completeness, and logical integrity.
• Work at the frontier of AI research, helping train the next generation of mathematically capable language models.

• Hold a Master's degree or PhD in Mathematics or a closely related field.
• Possess a strong background in rigorous mathematical proof writing and logical reasoning.
• Have hands-on experience with formal proof assistants — Lean 4 strongly preferred.

Work arrangement: Fully remote

Eligible countries: United States