Physics Expert - AI Trainer (Remote, Portugal)

About the role

A remote, part-time contract (20 to 40 hours per week) for a Physics Expert who trains frontier AI models. The company creates high-quality STEM training data used directly in training and evaluation pipelines at leading AI labs to improve model reasoning in technical domains. The project lasts 2 months, with potential extension, and pays up to 40 USD per hour.

Key responsibilities

• Design advanced physics problems for frontier AI training and evaluation
• Create deterministic problems with exactly one correct answer
• Write complete, verified solutions and document the reasoning process
• Build problems that test deep physical reasoning and multi-step analysis, not just memorization
• Use Python or specialized tools where relevant to build simulations, models or computational workflows
• Ensure all outputs are technically precise, reproducible and well written in English

Required profile

• Master's or PhD in Physics or a closely related field
• Strong research or industry experience in theoretical, experimental or computational physics
• Ability to design original, difficult problems reflecting real physics workflows
• Nice to have: experience with simulation tools or domain-specific physics software (finite element tools, circuit simulators, symbolic systems)
• Nice to have: background in computational physics, statistical mechanics, electromagnetism, quantum mechanics or related fields
• Nice to have: experience evaluating model reasoning, benchmarking or designing technical assessments

Required skills

• Strong Python skills, with scientific libraries such as NumPy, SciPy or similar
• Solid understanding of modeling, simulation and numerical methods
• Technical writing in English