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 Netherlands.

The job description

About the Role

What if your deep knowledge of formal mathematics could directly shape how the most advanced AI systems in the world reason, prove, and think? We're looking for mathematicians with a passion for rigorous proof and formal systems to help build the mathematical foundations that frontier AI depends on.

This is a fully remote, flexible contract role working at the intersection of pure mathematics, logic, and cutting-edge AI research. The Netherlands has one of Europe's strongest traditions in mathematical logic and formal systems — if you know your way around Lean 4 and want to do deeply meaningful work, this opportunity is for you.

What You'll Do

Formalize advanced mathematical arguments and theorems in Lean 4, spanning a wide range of mathematical disciplines
Contribute to the growth and quality of large-scale formal mathematical libraries, including mathlib
Construct clean, readable, and well-structured formal proofs that translate informal mathematical reasoning into rigorous machine-checkable form
Audit and verify existing formal proofs for correctness, completeness, and logical integrity
Work at the frontier of AI research, helping train the next generation of mathematically capable language models

Who You Are

Hold a Master's degree or PhD in Mathematics or a closely related field
Possess a strong background in rigorous mathematical proof writing and logical reasoning
Have hands-on experience with formal proof assistants — Lean 4 strongly preferred
Can fluently translate informal mathematical ideas into structured, machine-verifiable formal proofs
Self-motivated and comfortable working independently in a remote, asynchronous environment

Nice to Have

Prior experience with proof verification, theorem proving, or mathematical formalization projects
Familiarity with mathlib or other large-scale formal mathematical libraries
Background in data annotation, data quality evaluation, or AI training workflows
Experience across multiple mathematical domains — topology, algebra, analysis, logic, and beyond

Why Join Us

Work on frontier AI research alongside the world's leading AI labs and research teams
Fully remote and flexible — structure your work around your life, not the other way around
Freelance autonomy with the intellectual depth of meaningful, high-stakes technical work
Contribute directly to formal mathematical libraries that will outlast any single project
Gain rare exposure to how cutting-edge large language models are built and trained
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.