Mathematics & Lean Expert — AI Data Annotation & Quality Review

Role Overview

We are seeking a Mathematics expert with strong experience in the Lean theorem prover to support a leading AI lab developing next-generation reasoning models. In this project-based role, you will review, annotate, and evaluate formal mathematical proofs and reasoning tasks, ensuring the highest standards of mathematical correctness and formal verification.

Key Responsibilities

• Annotate and review mathematical problems, proofs, and formal reasoning tasks.
• Write, validate, and evaluate formal proofs using Lean.
• Perform quality control (QC) on mathematical annotations and identify logical or formalization errors.
• Provide expert feedback to improve annotation and evaluation guidelines.

Required Qualifications

• Master's or PhD in Mathematics, Computer Science, Logic, or a closely related field.
• Strong proficiency with the Lean theorem prover.
• Solid foundation in formal mathematics, proof writing, and mathematical reasoning.
• Experience formalizing mathematical concepts and verifying proofs in Lean.
• Excellent attention to detail and ability to evaluate technical content with consistency.
• Fluent in English.

Nice to Have

• Experience with Lean 4.
• Familiarity with theorem proving libraries such as Mathlib.
• Experience with other proof assistants (e.g., Coq, Isabelle, HOL Light, Agda).
• Background in AI, formal verification, or automated reasoning.

8-week initial contract with 2-week trial period

Up to 20 hours/week