Member of Technical Staff, Staff Physicist

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FirstPrinciples

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2024

🤖 Artificial Intelligence

🔬 Science

☁️ SaaS

Artificial Intelligence • Science • SaaS

FirstPrinciples is a research company building AI systems for discovery in fundamental science. It develops domain-specialized models and tools (branded Theo: Theo Collaborator, Theo Conjecture, and Theo, the AI Physicist) to assist the scientific process—hypothesis generation, symbolic reasoning, tool integration, validation loops, and reproducible research objects. The company emphasizes transparency, stewardship of knowledge as a public good, and alignment with the scientific community. Technical claims include multiple fine-tuned models across physics domains, a model family with 120B+ parameters trained on a curated corpus of 3M+ scientific papers, and internal experiments in areas like quantum information.

📋 Description

• Review and critique the model's reasoning in physics, identifying subtle conceptual errors and invalid assumptions. • Provide clear corrections, alternative derivations, and minimal counterexamples to shape what “good” scientific reasoning looks like. • Translate domain expertise into actionable improvements for model behaviour, reasoning patterns, and tool usage. • Create gold-standard solutions and reference outputs for training and fine-tuning. • Rank and evaluate model outputs to improve scientific reasoning through expert feedback loops. • Help build and operate our external Collaborators program, coordinating expert review cycles and integrating feedback into training and evaluation. • Contribute to high-quality research outputs (benchmarks, datasets, technical reports, preprints) that meet publishable standards.

🎯 Requirements

• PhD in Physics, or a closely related field, with postdoctoral-level research maturity. • 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. • Comfortable working in a fast-moving, cross-functional environment with researchers and engineers. • Mission-driven, with an entrepreneurial mindset and interest in tackling foundational problems in science.

🏖️ Benefits

• The opportunity to work on foundational problems at the intersection of AI and physics. • A high-trust, low-bureaucracy environment with real ownership. • Remote-first work with flexibility in how you structure your day. • 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.