Mathematical Formalization Specialist (Lean / Formal Proof Systems)

About The Role What if your deep mathematical training could directly shape the future of AI reasoning? We're looking for mathematicians with hands-on experience in formal proof systems - especially Lean - to tackle problems that sit beyond the reach of automated tools. This is a fully remote, flexible contract role at the intersection of mathematics and computer science. You'll work on genuinely hard problems, translating rigorous human arguments into machine-verifiable formalizations that help map the frontier of what proof assistants can express, capture, and automate. Organization: Alignerr Type: Hourly Contract Location: Remote Commitment: Flexible, task-based What You'll Do Translate informal mathematical proofs into Lean (and related proof systems) with an emphasis on clarity, structure, and correctness Analyze proofs across mathematical domains - identifying gaps, hidden assumptions, and formalizable sub-structures Construct formalizations that test the limits of existing proof assistants, especially where automated tools struggle or fail Collaborate with AI researchers to design, refine, and evaluate strategies for improving formal verification pipelines Develop clean, reproducible proof scripts aligned with mathematical best practices and proof assistant idioms Provide expert guidance on proof decomposition, lemma selection, and structuring techniques for formal models Sample Work You Might Do Formalize classical proofs and compare machine-verifiable structures against textbook arguments Investigate where automated provers break down - and articulate precisely why (complexity, missing lemmas, insufficient libraries, etc.) Write Lean proofs that reveal deeper patterns or generalizations implicit in the original mathematics Required Who You Are Master's degree or higher in Mathematics, Logic, Theoretical Computer Science, or a closely related field Strong foundation in rigorous proof writing across areas such as algebra, analysis, topology, logic, or discrete mathematics Hands-on experience with Lean (Lean 3 or Lean 4), Coq, Isabelle/HOL, Agda, or comparable formal proof systems - Lean strongly preferred Genuine enthusiasm for formal verification, proof assistants, and the future of mechanized mathematics Ability to translate dense, informal mathematical arguments into clean, structured formal proofs Nice To Have Familiarity with type theory, the Curry-Howard correspondence, and proof automation tools Experience contributing to large-scale formalization projects such as mathlib Exposure to theorem provers where automated reasoning frequently fails or requires manual scaffolding Strong communication skills for articulating formalization decisions, edge cases, and reasoning strategies The Ideal Candidate You're a mathematically mature problem-solver who finds genuine satisfaction in taking a dense, elegant argument and expressing it in a form a machine can understand. You appreciate precision, structural beauty, and the intellectual challenge of resolving gaps that automated tools cannot yet bridge. You don't just do mathematics - you think carefully about how mathematics is done. Why Join Us Work on cutting-edge AI research projects alongside leading research labs Fully remote and flexible - work when and where it suits you Freelance autonomy with the structure of meaningful, intellectually stimulating work Contribute directly to advancing the reliability and reasoning capabilities of next-generation AI Potential for ongoing work and contract extension as new projects launch #J-18808-Ljbffr Alignerr