AlignerrDomain experts
Mathematician – Formal Systems & AI Foundations (Remote Contract)
up to $200/hr
About this role, in Alignerr's words
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.
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
Show all 5 itemsHide the other 2 in What you'll do
- 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
Candidate background
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
Show all 4 itemsHide these 4 items in 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
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 – Formal Systems & AI Foundations (Remote Contract)
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. If you live and breathe formal proof — and especially if you know your way around Lean 4 — this is a rare opportunity to contribute to frontier AI development on your own schedule, from anywhere in Germany.
- Organization: Alignerr - Type: Hourly Contract - Location: Remote - Commitment: 10–40 hours/week
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
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 692 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 259 distinct rates we count, 234 are lower and 15 are higher.
| Platform | Roles | Top of range, per hour |
|---|---|---|
| Alignerr (this platform) | 148 | $24 to $200 · median $80 |
| micro1 | 130 | $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
- a67b0710-ba55-4a94-aa2d-cdc8a6b85e74
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.
Keep exploring
More like this
Related field, different requirements. Check each role's own page before you apply.