Is this job worth applying to?

Pay

Above typicalTops out at $200/hr. The typical top rate across 47 priced math listings is $90/hr.

Getting in

Hard to get in~1–2 hours of assessments. Valid government photo ID.

Steady work

Work is patchyFeast-or-famine project volume.

Payout record

Some delaysSchedule: weekly, by Friday for the prior Monday–Sunday. Paid via Stripe or PayPal (depends on country).

Freshness

RecentPosted 2w ago. Still listed on Alignerr on Nov 6, 2026.

Where you live

Named countries onlyOpen in United States.

The job description

About the Role

What if your deep knowledge of formal proof and mathematical rigor could directly shape how AI reasons about mathematics? We're looking for Lean 4 experts to translate rigorous mathematical content into machine-verified formal proofs — working at the cutting edge of AI development where automation alone isn't enough.

This is a fully remote, flexible contract role built for mathematicians and formal verification specialists who want meaningful, high-impact work on their own schedule.

What You'll Do

Formalize mathematical content from natural language sources — textbooks, research articles, exercises — into valid, compilable Lean 4 code
Translate theorems, lemmas, propositions, and proofs into precise formal representations
Ensure formal code accurately captures the mathematical meaning and logical structure of original statements
Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
Identify ambiguities, missing assumptions, or logical gaps in informal mathematical descriptions
Contribute to high-quality datasets pairing human-written mathematics with formal Lean 4 equivalents for AI training

Who You Are

Strong hands-on experience with Lean 4 — you write precise, correct, and maintainable formal proofs
Solid background in mathematics, formal logic, or formal verification
Comfortable reading advanced mathematical texts and translating them into formal systems
Exceptional attention to detail and commitment to logical rigor
Interested in the intersection of AI, automated reasoning, and mathematical verification

Nice to Have

Experience with other theorem provers or formal systems (Coq, Isabelle, Agda, etc.)
Prior involvement in AI training, expert annotation, or reasoning-focused dataset creation
Familiarity with proof assistants or formal methods research
Background in academic mathematics or computer science research

Why Join Us

Work at the frontier of AI — your contributions directly improve how AI models reason about mathematics
Fully remote and flexible — work from anywhere, entirely on your own schedule
Clearly defined tasks and evaluation criteria — you always know what success looks like
Top performers are selected for extended engagements and advanced or leadership tracks
Join a network of elite mathematicians and specialists solving problems automation can't

How do you apply to Alignerr?

Apply on Alignerr

The Apply button opens this post on Alignerr's own site. You apply with them, not with Rubric. Budget about 1–2 hours of assessments.

Get through screening

What Alignerr asks for after you apply:

Take the TestGorilla skills assessment (usually one attempt per role)
Verify your identity with Persona
Join the Alignerr Slack community
Set up payouts once you are assigned to a project

Start work and get paid

Pay schedule: weekly, by Friday for the prior Monday–Sunday. Paid via Stripe or PayPal (depends on country). You're paid for the work they hand out, not a fixed salary.

Alignerr also needs

Valid government photo ID
Degree or professional experience for expert roles
Webcam for proctored assessments on some roles

Red flags

Red flagLong gaps with no project after passing
Red flagWorker reports of delayed or withheld payments on Glassdoor

What is Alignerr like to work for?

Labelbox's contractor network, which hires generalists and domain experts to label data and write and grade AI training tasks.

Advertised pay	$15–150/hr
Getting in	Hard to get in
Application takes	~1–2 hours of assessments
How you get paid	Weekly, by Friday for the prior Monday–Sunday, via Stripe or PayPal (depends on country)
Payout record	Some delays
Countries	Accepts most countries but blocks signups from about two dozen; posts India-specific roles such as Hindi, Telugu and Indian-English language and cultural review work.

Generalist and bilingual work is around $15–20/hr, coding QA $30–40/hr, and senior software, advanced math, medical and law roles $70–150/hr; some projects pay per approved task.