Hire Experts Who Verify AI Reasoning Step by Step
Post a job and hire from the largest network of reasoning reviewers and domain SMEs for math, code, science, and logic. Step-level correctness labels for training process reward models. 100,000+ pre-vetted specialists.
Scale your process supervision data with reviewers who work in your existing tools.
Reviewers to Domain SMEs
Generalist reviewers for throughput, domain experts for math, code, science, legal, finance, and more
Any Tooling
Reviewers work inside your annotation platform, custom interface, or internal pipeline
Any Reasoning Domain
Math, code, logic, multi-hop chains, scientific reasoning, domain-specific problems, and more
Hire for Any Platform or Internal Tooling
Have your own tooling? Our talent works directly in your platform.
Pre-Vetted Experts
Countries
Languages
How OpenTrain Works for Reasoning Step Verification
Post a Job and Receive Pre-Screened Applicants
Describe your labeling criteria, domain requirements, and volume needs. Receive proposals from reviewers and SMEs with relevant experience in reasoning evaluation, process supervision, or your target field.
Hire and Add to Your Tools
Review candidates, make your hires, and invite them to any annotation platform, custom interface, or internal data pipeline.
Communicate and Pay in One Place
Share rubrics and verification guidelines, message your team, and handle global payments from a single dashboard.
Start Building Your Reasoning Step Verification Team Today
Post your first job and connect with reasoning reviewers and domain SMEs who can deliver step-level correctness labels, error identification, and the process supervision data your models need.
Post Your Reasoning Step Verification Job
Describe your requirements and receive a curated shortlist of domain experts matched to your project. 15% flat fee, no hidden markups.
Full-Service, End-to-End
- Recruiting & live vetting
- Onboarding & training
- Daily management & QA
- Dedicated program lead
Build a career training the world's top AI models.
Freelance AI Trainer?
Join 127,000+ freelancers
Data Labeling Company?
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The #1 Talent Network for Reasoning Step Verification
Pairwise preference ranking, Likert scoring, multi-criteria rubrics, safety red-teaming — whatever your evaluation framework requires, we have raters with direct experience running it across domains like math, code, medicine, and law.
FAQs about Hiring for Reasoning Step Verification
Quick answers to common questions about process supervision data on OpenTrain.