Statistician

About the Role

We are looking for statisticians to help train and evaluate AI models on statistical reasoning and data analysis. You will design analysis tasks, review AI-generated statistical work, and write the reference answers that models are measured against.

Key Responsibilities

Design statistical analysis tasks (hypothesis testing, regression, experimental design, causal inference) with reference answers.
Review AI-generated analyses for correct method choice, assumptions, interpretation and communication of uncertainty.
Develop and refine statistical and mathematical arguments used in AI evaluation tasks.
Interpret and summarise complex numerical datasets for model-training scenarios.
Write rubrics and structured feedback on model outputs.
Document common statistical misconceptions that models repeat.
Follow project guidelines, take part in calibration and review sessions, and incorporate feedback to keep quality consistent.

Who We're Looking For

Required Qualifications

Master’s degree in statistics or a related field, or 5+ years of professional experience as a statistician or statistical analyst.
Strong working knowledge of R or Python for statistical analysis.
Experience with applied analysis on real datasets.
Excellent written English.
Reliable, detail-oriented, and able to work independently and meet deadlines in a remote setting.

Preferred Qualifications

Experience training professionals in statistical methods for AI or machine learning.
Clinical, survey or econometric analysis experience.
Experience with causal inference or Bayesian methods.

Legal and Compliance Notice

All content you submit must be lawful, and you must have the right to share it.
Do not submit confidential or proprietary material belonging to an employer, client or third party, or personal data without a lawful basis.
Rex may verify identity, credentials, ownership and licensing; may reject or remove any submission; and may report unlawful submissions to the relevant authorities.
Engagement and payment are subject to successful verification and to applicable sanctions, export-control, tax and employment laws.
The contractor agreement will set out ownership and licence terms for the work you deliver (to be confirmed by Rex Legal).

Compensation

USD $60–120 per hour, adjusted by country of residence.