AlignerrDomain experts
Mathematician (Foundations / Formalization)
up to $200/hr
About this role, in Alignerr's words
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.
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
Show all 5 itemsHide the other 2 in What you'll do
- Translate informal mathematical reasoning into structured, machine-checkable formal proofs
- Work independently and asynchronously — fully on your own schedule
Candidate background
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
Show all 4 itemsHide these 4 items in 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
Quoted from selected sections of Alignerr's posting. The full posting may state other conditions. Read the full posting
A closer look
More context, when you need it.
Full job descriptionThe original posting, in Alignerr's words
Posted by Alignerr, reproduced here so you can judge the role before clicking. Original posting ↗
Mathematician (Foundations / Formalization)
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.
- Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 10–40 hours/week
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
Working with AlignerrPay, getting started and work, from Alignerr's own pages
What the platform publishes in general. These are not extra terms confirmed for this particular role.
- Getting paid
- Billed weekly, Monday to Sunday, with approved work paid by the following Friday, according to Labelbox's help center. Payment goes through Stripe Connect or PayPal depending on your location, with one provider per country. intercom.help/labelbox/en/articles/13600616-alignerr-paym..., alignerr.com/process
- Before your first paid task
- Sign up, apply, verify your identity, set up billing and onboard. Some jobs add a Zara AI interview or domain assessments. alignerr.com/process
- How much work
- Time to your first project depends on demand and your skills, and there is no minimum number of hours. alignerr.com/faqs
- Contract
- Independent contractor, under terms with ALIGNERR LLC. alignerr.com/faqs, alignerr.com/privacy
Read on the pages linked above on 24 Sep 2026. Platforms change these terms, so check the linked page before you rely on one.
How does the pay compare?Across Domain experts roles, not this role alone
From our own daily reads of every open listing on the platforms we follow, not from Alignerr's posting. How we count.
Pay across the field: Domain experts
Across 698 roles in this field with a stated hourly rate in US dollars, on 18 platforms, the middle half pays $65 to $130 an hour at the top of the range, and the median is $100. This role's top rate, $200, is in the top quarter. Of the 260 distinct rates we count, 235 are lower and 15 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 148 | $24 to $200 · median $80 |
| micro1 | 136 | $28 to $400 · median $110 |
| AfterQuery | 88 | $45 to $175 · median $100 |
| Handshake AI | 79 | $30 to $300 · median $85 |
| Mercor | 78 | $55 to $450 · median $120 |
Sources and listing historyWhere this information comes from
This listing's history
- First seen here on 27 Aug 2026, and still on Alignerr's list when we last read it on 13 Oct 2026.
- The listed pay has not changed since then.
- Posted by Alignerr
- First seen by AIPayList
- Last seen live
- Listing ID
- a2520be7-908b-4ae5-9c46-5d0c2686fc12
Pay as the source states it: “$170-200/hr”.
Platforms sometimes change a rate after posting. Every listing here is re-read at least once a day and corrected when its source moves, so a difference you see on the platform is usually a change made since the last read. How freshness works.
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