FirstPrinciples

Member of Technical Staff, Staff Physicist

Ontario, Canada - Remote · Staff+

Sponsorship not specifiedDetected 215 days ago

PythonGitLaTeXResearch

About the role

We're a fast-growing, remote-first team of builders, researchers, engineers, and thinkers working across Canada, the US, the UK, and expanding globally.
This is work that sits somewhere between creativity and rigorous thinking, and often requires comfort with ambiguity and iteration.
If you're someone who enjoys tackling big, abstract problems and exploring ideas that don't yet have a defined path forward, you'll likely find the work here interesting.

Create gold-standard solutions and reference outputs for training and fine-tuning.
Help build and operate our external Collaborators program, coordinating expert review cycles and integrating feedback into training and evaluation.
FirstPrinciples is a research organization building AI infrastructure for discovery in fundamental science.
Currently, our work focuses on building systems like Theo, the AI Physicist, which is a domain-specialized system for research in fundamental physics.
What brings us together is a shared curiosity about how the universe works, and a belief that we can build systems that help us explore it more effectively.
We spend our time working on questions that don't have clear answers, like how to design AI that can reason through scientific problems, and how the scientific process as a whole might evolve.

Proven ability to reason at a research level in physics and rigorously critique proofs, derivations, and scientific arguments.
Strong scientific programming skills (Python) and experience with research tooling (Git, LaTeX).
Clear, precise communicator with a strong ability to translate complex ideas into sharp critiques, guidance, and evaluation frameworks.

The opportunity to work on foundational problems at the intersection of AI and physics.
A high-trust, low-bureaucracy environment with real ownership.
Exposure to cutting-edge ideas across AI, scientific discovery, and emerging technologies.
A culture that values curiosity, depth of thinking, and first-principles reasoning.
The chance to contribute to work aimed at advancing fundamental science.

Mission-driven, with an entrepreneurial mindset and interest in tackling foundational problems in science.

We are building an AI Physicist, but there is no established way to define, evaluate, or measure high-quality research when AI is part of the system.
This role exists to bring deep domain expertise to shape how the system learns, what "good" looks like, and how we benchmark progress, ensuring the outputs are scientifically rigorous, meaningful, and advance the field.

This listing is sourced directly from FirstPrinciples's careers page and normalized into a canonical job model.