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STEM PhD Expert for AI Reasoning & Evaluation

Braintrust BrainTrust ContractRemote
Posted Oct 3, 2026 · ✓ Still open — checked 3 hours ago

Quick facts

Pay
$50–150 / hour
Type
Contract
Location
Remote
Hours
35+ hours / week
Background
PhD
Skills
Machine Learning
Platform
BrainTrust — 146 open jobs
Typical pay at BrainTrust
$13–100/hour · median $30 (100 jobs on our site)
Apply
Free to apply — never pay to get AI training work
  • Rate: $50 – $150/hr
  • Hours: 35 hours / week
  • Experience: 3 - 5 years
  • Location: United States | Canada + 6 more

We're hiring PhD-level experts to help train and evaluate advanced AI models. This is remote, flexible contract work where your academic expertise directly shapes how cutting-edge models reason, answer, and improve. You'll review AI-generated content in your field, identify where the model gets things right or wrong, and help raise the quality bar on technical reasoning.

This is a short-term engagement running through the end of June, with potential to extend depending on project needs.

Key Responsibilities

You may contribute your expertise by:

  • Assessing the factuality and relevance of domain-specific text produced by AI models
  • Crafting and answering questions related to Machine Learning and AI
  • Evaluating and ranking domain-specific responses generated by AI models

What We're Looking For

  • A PhD (completed or in final stages) in one of the following fields: Machine Learning / AI, Computer Science, Engineering, Statistics, or a closely related quantitative subdomain such as Mathematics or Physics
  • Strong analytical and critical-thinking skills, with the ability to spot subtle errors in technical reasoning
  • Fluent written English and the ability to communicate complex ideas clearly

Nice to Have

  • Research experience (academic or industry)
  • Prior experience with data annotation or AI model evaluation
  • Experience reviewing or publishing research papers

Compensation

Up to $150/hr, depending on your area of expertise, depth of experience, and assessment performance.

Location

This role is fully remote. We are currently accepting applicants based in:

United States, Canada, Puerto Rico, Mexico, United Kingdom, Australia, New Zealand, and Argentina.

Company: Outlier

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About BrainTrust

Braintrust is a talent network that matches freelancers and professionals with companies, including AI labs that need experts for training and evaluation work. Its AI recruiter handles screening.