Hire Problem Authors Who Create High-Signal Reasoning Data
Post a job and hire from the largest network of problem writers and domain SMEs for math, code, science, logic, and specialized fields. Original problems with step-by-step solutions. 100,000+ pre-vetted specialists.
Scale your reasoning data with experts who work in your existing tools.
Writers to Domain Experts
Problem authors for volume, SMEs for math, code, science, legal, finance, and more
Any Tool
Use off-the-shelf, open-source, or your custom annotation tooling
Every Reasoning Type
Math, logic, multi-hop, coding challenges, 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 Problem Creation
Post a Job and Receive Pre-Screened Applicants
Describe your problem format, difficulty requirements, and domain needs. Receive proposals from writers and SMEs with relevant experience in reasoning tasks, solution authoring, or your target field.
Hire and Add to Your Tools
Review candidates, make your hires, and invite them to your document systems, custom interfaces, or internal data pipelines.
Communicate and Pay in One Place
Share guidelines and solution specifications, message your team, and handle global payments from a single dashboard.
Start Building Your Reasoning Data Team Today
Post your first job and connect with problem authors and domain SMEs who can deliver original problems, step-by-step solutions, and the high-quality reasoning data your models need.
Post Your Reasoning Problem Creation 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.
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Domain Writers Who Produce Expert-Level Training Data
Generating high-quality training data means domain experts who can write like practitioners — not generalists following a script. Access writers with real-world expertise in your target domain.
FAQs about Hiring for Reasoning Problem Creation
Quick answers to common questions about reasoning data on OpenTrain.