Formal Mathematics Specialist (Lean / Coq / Isabelle)

$80–130/hr

rate as listed

Workload: 20+ hrs/week
Engagement: Project-based
Location: US
Field: Sciences

Create, check and repair formal proofs and statements for AI training work involving graduate-level mathematics. The role requires demonstrated experience with an interactive theorem prover and reliable weekday availability.

The work

You will design difficult formal-mathematics tasks, produce structured solutions and translate informal mathematics into formal statements. Day-to-day work may include writing, checking and repairing proofs, evaluating model-generated work, giving technical feedback and developing rubrics for correctness, faithfulness and elegance.

What the screen assesses

The platform will look for verifiable proof-assistant work, graduate-level mathematical depth and sound judgment when a proof is technically accepted but poorly formalized. Required proof-assistant experience may be evidenced in Lean 4 (Mathlib), Coq (Rocq), Isabelle/HOL or a comparable proof assistant. The overview names Lean, Coq (Rocq) or Isabelle as relevant interactive theorem provers, and candidates need hands-on experience in at least one qualifying environment, not all three.

Background

Candidates need graduate-level training in mathematics, computer science or logic, or equivalent professional experience in formal verification. Relevant mathematical backgrounds include algebra, analysis, number theory, combinatorics and logic, supported by demonstrable projects, contributions, publications or professional work.

Logistics

This is a W-2 employment position with Cincinnatus LLC, with potential placement at an AI lab as part of its extended workforce. The required commitment is at least 20 hours per week during weekdays. The listing does not specify whether the engagement is remote or how much of the work is asynchronous.

Pay band: $80–130/hr

What they look for

Graduate-level training in mathematics, computer science or logic, or equivalent professional experience in formal verification
Hands-on proof development in Lean 4 (Mathlib), Coq (Rocq), Isabelle/HOL or a comparable proof assistant
Proof-based mathematics in algebra, analysis, number theory, combinatorics or logic
Demonstrable mathematical or formal-verification work
Formal proof evaluation, repair and rubric design
Clear written explanation of technical decisions

Included with this listing

Interview prep — 10 questions

Matched to what this platform's screening actually measures. Answer each out loud in 60–90 seconds: claim → concrete example → implication.

What it tests: This tests whether your background reaches the required level in mathematics, computer science, logic or professional formal verification and can be checked through specific institutions, roles or outputs.
A strong answer: Give the degree, candidacy status or professional role, then connect named courses, research or verification responsibilities to formal proof work. Include dates and a concrete artifact or outcome that can be verified.
Where people lose it: Candidates lose points by describing a general interest in mathematics or AI without identifying graduate-level work or an equivalent formal-verification responsibility.

Summary, eligibility guidance and screening preparation are prepared by Sidequest from the platform's posting. Check the source listing before applying.