Lean Engineer, Formal Mathematics

Job overview

The Lean Engineer, Formal Mathematics role is fully remote. Compensation is $90–$110 per hour, with a commitment of 20–40 hours per week. Mercor connects technical talent with leading AI research labs. The engineer formalizes mathematical statements and proofs in Lean 4 and reviews AI-generated work for correctness. The role helps establish proof-quality and mathlib conventions while collaborating with other Lean engineers and researchers.

What you'll do

• Write idiomatic Lean 4 statements and proofs that compile against mathlib
• formalize mathematics from competition problems, textbooks, and research
• review AI-generated Lean statements and proofs and provide specific feedback
• help define proof-quality, statement-fidelity, and mathlib guidelines
• collaborate with Lean engineers and researchers.

What we're looking for

Skills & competencies

lean engineer

formal mathematics

remote

mercor

contract

part-time commitment

lean 4

mathlib

theorem proving

ai-generated proof review

$90–$110/hr

20–40 hours/week

Work arrangement

• Weekend coverage required

Why this role

Remote contract opportunity; requires hands-on Lean 4 proof-writing experience and availability for at least 20 hours per week on weekdays.

About the employer

Mercor is hiring for this role. Industry: Custom Computer Programming Services. Sector: 54.