$170 - $200/hr
Lean 4 Mathematical Formalization Expert $170-200/hr Remote Freelance STEM About the Role What if ... Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
$170 - $200/hr
Lean 4 Mathematical Formalization Expert $170-200/hr Remote Freelance STEM About the Role What if ... Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
$170 - $200/hr
Lean 4 Mathematical Formalization Expert $170-200/hr Remote Freelance STEM About the Role What if ... Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
$170 - $200/hr
Lean 4 Mathematical Formalization Expert $170-200/hr Remote Freelance STEM About the Role What if ... Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
... reviews, focus groups, and 1x1 interviews in key markets to vet the accuracy and depth of content ... Collaborate with the content development team and freelancers to set strategy on market research ...
... reviews, focus groups, and 1x1 interviews in key markets to vet the accuracy and depth of content ... Collaborate with the content development team and freelancers to set strategy on market research ...
Freelance Textbook Reviewer information
See salary details
$29.57 - $33.37
3% of jobs
$33.37 - $37.17
2% of jobs
$37.17 - $40.97
0% of jobs
$40.97 - $44.78
0% of jobs
$44.78 - $48.58
0% of jobs
$48.58 - $52.38
1% of jobs
$52.38 - $56.18
0% of jobs
$56.18 - $59.99
17% of jobs
$60.30 is the 25th percentile. Wages below this are outliers.
$59.99 - $63.79
25% of jobs
The median wage is $64.09 / hr.
$63.79 - $67.59
26% of jobs
$67.74 is the 75th percentile. Wages above this are outliers.
$67.59 - $71.39
26% of jobs
$29
$62
$71
How much do freelance textbook reviewer jobs pay per hour?
As of Aug 30, 2026, the average hourly pay for freelance textbook reviewer in the United States is $62.54, according to ZipRecruiter salary data. Most workers in this role earn between $60.34 and $68.27 per hour, depending on experience, location, and employer.
What cities are hiring for Freelance Textbook Reviewer jobs?
Cities with the most Freelance Textbook Reviewer job openings:
What are the most commonly searched types of Textbook Reviewer jobs?
The most popular types of Textbook Reviewer jobs are:
What states have the most Freelance Textbook Reviewer jobs?
States with the most job openings for Freelance Textbook Reviewer jobs include:
$170 - $200/hr
Full-time
Posted 23 days ago
Job description
Lean 4 Mathematical Formalization Expert
$170-200/hr Remote Freelance STEM
About the Role
What if your deep expertise in formal mathematics could directly shape how AI reasons, proves, and verifies mathematical truths? We're looking for Lean 4 specialists to translate complex mathematical arguments into precise, machine-checked formalizations — working at the frontier where mathematics meets artificial intelligence.
This is a fully remote, flexible contract role built for mathematicians and formal verification experts who want to do genuinely challenging, high-impact work on their own schedule.
What You'll Do
- Formalize mathematical content from natural language sources — textbooks, articles, and exercises — into valid, compilable Lean 4 code
- Translate theorems, lemmas, propositions, and proofs into precise formal representations using Lean 4
- Ensure formal code accurately captures the mathematical meaning and logical structure of the original statements
- Review and validate Lean 4 formalizations for correctness, consistency, and logical soundness
- Identify ambiguities, missing assumptions, or logical gaps in informal mathematical descriptions
- Contribute to high-quality datasets pairing human-written mathematics with formal Lean 4 equivalents for AI training
Who You Are
- Strong hands-on experience with Lean 4 — you write precise, correct, and maintainable code
- Solid background in mathematics, formal logic, or formal verification
- Comfortable reading advanced mathematical texts and translating them into formal systems
- Exceptional attention to detail and a rigorous logical mindset
- Interested in AI, automated reasoning, and the future of mathematical verification
- Self-directed and reliable when working independently on complex, open-ended problems
Nice to Have
- Experience with other theorem provers or formal systems (Coq, Isabelle, Agda, Metamath, etc.)
- Prior involvement in AI training, expert annotation, or reasoning-focused datasets
- Background in formal methods research or proof assistant development
- Academic or professional experience in pure or applied mathematics
Why Join Us
- Work on cutting-edge AI projects alongside leading research labs
- Fully remote and flexible — work when and where it suits you
- Freelance autonomy with the structure of clearly defined, meaningful tasks
- High-impact work — your formalizations directly improve how AI models reason about mathematics
- Top performers are invited to advanced tracks and extended contracts with greater scope and responsibility