Skip to content
LLM & Agent Solutions / Reasoning Problem Creation

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.
OpenTrain dashboard for a reasoning problem creation project showing hired AI trainers specializing in math, coding, and physics problem writing.
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
All-In-One

One Place to Hire and Manage Your Reasoning Data Team

Everything you need to build a team that delivers original problems and solutions for training reasoning models, building evaluation sets, and process supervision.

The #1 Network for Problem Authors

Problem writers for volume, domain SMEs for math, code, science, and specialized fields, and QA reviewers for correctness. Find the right people for any reasoning data project.
Post a Reasoning Challenge Set Job
Go to page icon
Three shortlisted reasoning problem creation experts on OpenTrain showing their domain specializations in math, coding, and physics with hourly rates and availability status.

Work Happens in Your Tooling

Authors work inside your document systems, custom interfaces, or internal data pipelines. You control access and permissions. Your data never leaves your systems.
Post a Reasoning Challenge Set Job
Go to page icon
OpenTrain workspace showing shortlisted reasoning problem creation experts with specializations in math and coding ready to invite to your tools.

Communication and Project Hub

Built-in chat, instruction editor, and everything you need to coordinate problem authoring across distributed teams. Share guidelines, manage review cycles, and calibrate difficulty levels in one place.
Post a Reasoning Challenge Set Job
Go to page icon
OpenTrain project hub for Reasoning Problem Creation showing project instructions editor with collaborative cursors and team chat channel with 55 members.

Secure Global Payments and Transparent Pricing

Pay AI Trainers in any country from a single dashboard. You set the rates, we add a small fixed fee on top. No hidden costs, no chasing invoices.
Post a Reasoning Challenge Set Job
Go to page icon
OpenTrain escrow payment interface showing 10 Reasoning Problem Creation Hours at $55/hr with 75% escrow funded and Stripe release button for $550.00.
OpenTrain job posting interface for Reasoning Problem Creation showing job form, Lean and Your Custom Tool integration options, and button to invite all reasoning problem creation experts.
Why OpenTrain

Hire Problem Authors at Scale for Any Reasoning Type

Post a job and get a shortlist of qualified writers and SMEs ready to start authoring. Hire for:
Original problem writing for math, logic, coding, and multi-step reasoning
Step-by-step solutions with gold answers and full solution traces
Private evaluation sets that are search-resistant and contamination-free
Domain-specific challenges in science, finance, legal, medical, and more
QA review to catch ambiguity, edge cases, and solvability issues
How It Works

How OpenTrain Works for Reasoning Problem Creation

Create your account, post a job, and hire specialists who work inside your existing tools.
01
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.
02
Hire and Add to Your Tools
Review candidates, make your hires, and invite them to your document systems, custom interfaces, or internal data pipelines.
03
Communicate and Pay in One Place
Share guidelines and solution specifications, message your team, and handle global payments from a single dashboard.

Post Your Reasoning Data Job Now

Create an account and post your first job in minutes.
Post a Reasoning Problem Job

Large Project? We Can Help.

Get a dedicated team managed end-to-end for large reasoning data projects.
Get a Managed Service Quote
Get Started

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.
OpenTrain Reasoning Problem Creation workspace showing 83 hired AI trainers, 24 projects completed, and 3 shortlisted AI trainers with Lean and Your Custom Tool integrations and expert profiles specializing in combinatorics, graph algorithms, and number theory competition problems.
Abstract dark teal background with connected nodes and network lines representing AI reasoning and problem-solving concepts.
Metrics

Where AI Teams Hire Problem Authors at Scale

The largest network of reasoning data specialists, ready to work in any tool or internal workflow.
100K+
pre-vetted AI training specialists
50+
domains and specializations
24 hrs
avg. time from job post to production start
FAQ

FAQs about Hiring for Reasoning Problem Creation

Quick answers to common questions about reasoning data on OpenTrain.

You can hire for math and quantitative reasoning, logic puzzles, multi-hop and multi-step problems, coding challenges, scientific reasoning, counterfactual scenarios, and domain-specific problems in finance, legal, medical, and more. Whether you need original problems for model training, private evaluation sets, or curriculum data from easy to hard, you can find experienced specialists in our network.

Yes. Many reasoning tasks require subject matter expertise to craft problems with real-world grounding. You can hire domain specialists in STEM, finance, legal, medical, engineering, and other fields. They work alongside generalist writers or on specialized problem sets where domain knowledge is essential.

You define the specifications and review process. OpenTrain gives you the tools to share guidelines, manage review cycles, and communicate with your team. Many clients hire QA reviewers alongside problem writers to verify solvability, catch ambiguity, and check solution accuracy.

Authors work directly in your systems. This includes document platforms, custom interfaces, or your own internal data pipelines. OpenTrain is tool-agnostic, so you invite hires to your environment and maintain full control over access, data, and security.

Pricing is set between you and the authors you hire. Rates vary based on problem complexity, domain expertise required, and deliverable format. You can review proposals, compare rates, and negotiate directly. Payments are handled through OpenTrain with funds released upon your approval.

Yes. For large or ongoing reasoning data projects, OpenTrain can handle recruiting, onboarding, quality management, and delivery end-to-end. You get a dedicated team working inside your tools without the operational overhead.

Integrations

Hire for Any Platform or Internal Tooling

Hire problem authors on OpenTrain, then invite them to any annotation tool, document platform, or your own internal systems.
Get Started

Join the #1 Platform for AI Training Talent

Where top AI builders and expert AI Trainers connect to build the future of AI.
Self-Service
Post a Job
Post your project and get a shortlist of qualified AI Trainers and Data Labelers. Hire and manage your team in the tools you already use.
Managed Service
For Large Projects
Done-for-You
We recruit, onboard, and manage a dedicated team inside your tools. End-to-end operations for large or complex projects.
For Freelancers
Join as an AI Trainer
Find AI training and data labeling projects across platforms, all in one place. One profile, one application process, more opportunities.