Lean 4 Proof Engineer — Mathematical Formalization

About The Role

What if your deep mathematical training could directly shape how the world's most advanced AI systems reason about formal logic and proof? We're looking for Lean 4 Proof Engineers to translate complex, human-written mathematical arguments into precise, machine-verifiable formalizations — pushing the boundary of what modern proof assistants can express and automate.

This is a fully remote, flexible contract role built for mathematicians who live at the intersection of rigorous proof construction and formal verification.

• Organization: Alignerr
• Type: Hourly Contract
• Location: Remote
• Commitment: 10–40 hours/week

What You'll Do

• Translate informal mathematical proofs into Lean 4 (and related systems) with an emphasis on clarity, structure, and correctness
• Analyze domain-specific proofs, identifying gaps, hidden assumptions, and formalizable sub-structures
• Construct formalizations that stress-test the limits of existing proof assistants — especially where automation breaks down




• Collaborate with AI researchers to design, refine, and evaluate formal verification strategies
• Develop readable, reproducible proof scripts aligned with best mathematical practices and proof assistant idioms
• Provide expert guidance on proof decomposition, lemma selection, and structuring techniques for formal models
• Investigate where automated provers fail and articulate why — complexity, missing lemmas, insufficient libraries, and more
• Create Lean proofs that surface deeper patterns or generalizations implicit in the original mathematics

Who You Are

• Hold a Master's degree or higher in Mathematics, Logic, Theoretical Computer Science, or a closely related field
• Have a solid foundation in rigorous proof writing across areas such as algebra, analysis, topology, logic, or discrete math
• Have hands-on experience with Lean (Lean 3 or Lean 4), Coq, Isabelle/HOL, Agda, or comparable systems — Lean strong

📌 Lean 4 Proof Engineer (India)
🏢 Alignerr
📍 India