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

Not statedThe listing names no country.

The job description

About the Role

What if your deep knowledge of formal systems and rigorous proof methods could directly shape how the world's most advanced AI understands mathematics? We're looking for mathematicians with a passion for formal reasoning to help build the logical foundations that frontier AI models learn from — formalizing advanced mathematical arguments in Lean 4 and contributing to large-scale proof libraries like mathlib.

This is a fully remote, flexible contract role for mathematicians who love working at the intersection of pure mathematics, logic, and formal systems.

What You'll Do

Formalize advanced mathematical arguments and theorems within Lean 4, drawing from graduate-level textbooks and research across mathematical disciplines
Contribute to the development and quality of large-scale formal mathematical libraries, including mathlib, through clean and readable proof construction
Audit and verify existing formal proofs for correctness, clarity, and mathematical soundness
Translate informal mathematical reasoning into structured, machine-checkable formal proofs
Work independently and asynchronously — fully on your own schedule

Who You Are

Hold a Master's degree or PhD in Mathematics or a closely related field
Experienced in rigorous proof writing and formal mathematical reasoning
Proficient with formal proof assistants — Lean 4 strongly preferred
Able to bridge the gap between informal mathematical intuition and structured formal systems
Detail-oriented and precise — you care about getting every step exactly right
Self-motivated and comfortable working independently without close supervision

Nice to Have

Prior experience with proof verification, theorem proving, or formalization projects
Familiarity with mathlib or other large-scale formal mathematical libraries
Background in data annotation, data quality evaluation, or formal systems research
Experience with other proof assistants such as Coq, Isabelle, or Agda

Why Join Us

Work on frontier AI projects alongside world-leading research labs
Fully remote and flexible — structure your hours around your life
Freelance autonomy with the depth and substance of genuinely challenging mathematical work
Make a direct, lasting contribution to how AI reasons about mathematics at a foundational level
Potential for ongoing work and contract extension as new projects launch

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.