Lean 4 Mathematical Formalization Expert

* Formalize mathematical content from natural language sources — textbooks, articles, and exercises — into valid, compilable Lean 4 code * Translate theorems, lemmas, propositions, and proofs into precise formal representations using Lean 4 * Ensure formal code accurately captures the mathematical meaning and logical structure of the original statements * Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness * Identify ambiguities, missing assumptions, or logical gaps in informal mathematical descriptions * Contribute to high-quality datasets pairing human-written mathematics with formal Lean 4 equivalents for AI training

Who You Are

* Strong hands-on experience with Lean 4 — you write precise, correct, and maintainable code * Solid background in mathematics, formal logic, or formal verification * Comfortable reading advanced mathematical texts and translating them into formal systems * Exceptional attention to detail and a rigorous logical mindset * Interested in AI, automated reasoning, and the future of mathematical verification * Self-directed and reliable when working independently on complex, open-ended problems

Nice to Have

* Experience with other theorem provers or formal systems (Coq, Isabelle, Agda, Metamath, etc.) * Prior involvement in AI training, expert annotation, or reasoning-focused datasets * Background in formal methods research or proof assistant development * Academic or professional experience in pure or applied mathematics

Why Join Us

* Work on cutting-edge AI projects alongside leading research labs * Fully remote and flexible — work when and where it suits you * Freelance autonomy with the structure of clearly defined, meaningful tasks * High-impact work — your formalizations directly improve how AI models reason about mathematics * Top performers are invited to advanced tracks and extended contracts with greater scope and responsibility