Lean Engineer

The role

You will drive the organization's Lean and autoformalization initiative by setting conventions, architecture, and review structures. You will build shared Lean libraries and maintain structures to ensure agent autoformalization outputs are reliable and effective.

What you will do

• Nurture Lean wisdom throughout the organization and be a champion of Lean and autoformalization.
• Build and maintain the structures so we can trust agent autoformalization outputs: proof harnesses, code review workflows, etc.
• Build and maintain shared Lean libraries with clear definitions, useful abstractions, and a structure that supports review and further (automated) research.
• Consolidate overlapping formalizations, resolve inconsistent definitions, and build shared foundations for researchers and agents to reuse.
• Improve the reliability, maintainability, and performance of shared Lean projects.
• Support researchers in developing custom tools, tactics, and workflows to help them make progress.

Required qualifications

• Several years of experience writing Lean and mathlib.
• Expertise in Lean community practices.
• AI power user with experience with autoformalization.
• Communicate clearly.
• Strong mathematics or theoretical computer science background (Bachelor’s at minimum).
• Relevant bachelor's degree.

Nice to have

• Contributions to mathlib or other substantial Lean libraries.
• Experience designing or maintaining large formalization projects.
• Experience with Lean tooling, tactic development, metaprogramming, or proof automation.
• Experience with AI-assisted mathematical research or automated evaluation.

Benefits

• Five weeks of paid vacation plus public holidays
• Comprehensive medical, dental, and vision insurance
• Unlimited sick leave
• Unconditional 401(k) contribution equal to 4% of salary

Before you apply

• We can sponsor visas for relocation to Berkeley.
• Screening Call (30 minutes)
• Experience Interview (1 hour)
• Live Technical/Work test (optional)
• Individual conversations with Geoffrey and other team members

About the company

Resolution does research on how to align artificial superintelligence (ASI). It was founded in 2026 by researchers from UK AISI's Alignment Team and Timaeus.