Lean 4 Mathematical Formalization Expert

About The Role

We're looking for Lean 4 experts to translate rigorous mathematical content into machine-verified formal proofs — working at the cutting edge of AI development where automation alone isn't enough. This is a fully remote, flexible contract role built for mathematicians and formal verification specialists who want meaningful, high-impact work on their own schedule.

• Organization: Alignerr
• Type: Hourly Contract
• Location: Remote
• Commitment: Flexible — work at your own pace

What You'll Do

• Formalize mathematical content from natural language sources — textbooks, research articles, exercises — into valid, compilable Lean 4 code
• Translate theorems, lemmas, propositions, and proofs into precise formal representations
• Ensure formal code accurately captures the mathematical meaning and logical structure of 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 formal proofs
• 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 commitment to logical rigor
• Interested in the intersection of AI, automated reasoning, and mathematical verification

Nice to Have

• Experience with other theorem provers or formal systems (Coq, Isabelle, Agda, etc.)
• Prior involvement in AI training, expert annotation, or reasoning-focused dataset creation
• Familiarity with proof assistants or formal methods research
• Background in academic mathematics or computer science research

Why Join Us

• Work at the frontier of AI — your contributions directly improve how AI models reason about mathematics
• Fully remote and flexible — work from anywhere, entirely on your own schedule
• Clearly defined tasks and evaluation criteria — you always know what success looks like
• Top performers are selected for extended engagements and advanced or leadership tracks
• Join a network of elite mathematicians and specialists solving problems automation can't