Member of Technical Staff — Research, Physics

Causal; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Causal is building a Large Physics foundation Model to understand and predict physical systems, starting with weather and governed by physical law.

We seek domain experts to bring physics to bear on the model, develop evaluations of physical coherence, and advise on the physics of the systems we model.

You will collaborate with ML researchers and evaluation teams, exploring where physics-informed inductive biases help or hinder and how generalization occurs.

Qualifications

• Deep expertise in physics with focus on fluid dynamics or thermodynamics.
• Experience with numerical simulation of physical systems (CFD) and its trade-offs.
• Interest in combining machine learning with physical modeling.
• Ability to collaborate with ML researchers and translate physics into requirements.
• Rigorous, evidence-driven approach to evaluating model quality.

Responsibilities

• Bring physical principles to bear on the model and assess conservation laws.
• Develop evaluations for physical coherence beyond statistics.
• Advise on physics of modeled systems, from fluids to thermodynamics.
• Investigate LPM generalization across physical domains and breakdowns.
• Collaborate with model, evaluation, and interpretability teams to guide research.

Skills

Fluid dynamics

Thermodynamics

Computational physics

CFD familiarity

ML-physics intersection

Collaboration with ML researchers

Evidence-driven evaluation

Education

PhD or equivalent research experience

Job description

Our mission is general causal intelligence; AI that is capable of (1) predicting the future and (2) identifying the actions to alter it.

To achieve this breakthrough, we are building a Large Physics foundation Model (LPM) because physical systems, unlike text or images, are governed by verifiable cause and effect. We believe that scaling on physics will enable an understanding of causality required to predict and control physical systems, starting with weather.

Our founding team has built and deployed AI against the physical world in robotics, drug discovery, and particle physics at institutions like DeepMind, Waymo, Cruise, Insitro, Nabla Bio, and CERN.

We look for domain experts who are excited to tackle unsolved problems. Our thesis is that scaling on physics yields a model capable of understanding the causal structure to predict and alter the future. Your mission is to ensure the model evolves towards this thesis: grounded in physical law, evaluated against it, and ready to generalize across domains.

Responsibilities

• Bring physical principles to bear on the model — assessing consistency with conservation laws and physical constraints, and where physics-informed inductive biases help or hinder

• Develop evaluations that test whether the model's behavior is physically coherent, not just statistically accurate

• Advise on the physics of the systems we model, from fluid dynamics to thermodynamics, and their numerical treatment

• Investigate where the LPM generalizes across physical domains and where it breaks down

• Partner with model, evaluation, and interpretability teams to connect physical understanding to research direction

What we're looking for

We value a relentless approach to problem-solving, rapid execution, and the ability to quickly learn in unfamiliar domains.

• Deep expertise in physics — fluid dynamics, thermodynamics, computational physics, or a closely related field (typically a PhD or equivalent research experience)

• Familiarity with numerical simulation of physical systems (e.g. CFD) and its trade-offs

• Interest in where machine learning and physical modeling meet

• Ability to collaborate closely with ML researchers and translate physical principles into technical requirements

• A rigorous, evidence-driven approach to evaluating model quality