Principal Software Engineer – Physics

Responsibilities

• Define and implement high-quality, reusable software libraries for our core simulation engine.
• Drive code quality, testability, and architectural standards across the team, ensuring our production system scales gracefully and remains maintainable.
• Design interfaces that are easy to access and correctly reflect the physics they are modeling.
• Take ownership of critical system components, mentor junior engineers, and guide the team in transforming research prototypes into hardened, customer-facing features.
• Collaborate closely with a team of Physicists, AI researchers, Software Engineers and Computational Geometry experts to enforce software engineering best practices throughout the full development lifecycle, from ideation to deployment.

• 8+ years of experience in high-quality software development, with significant experience designing and building production-grade systems.
• Prior experience with scientific computing or physics simulators (FEM, FEA, Molecular Dynamics, FDTD), or large-scale machine learning systems.
• STEM MSc, PhD preferred but not required.
• Demonstrated ability to lead technical initiatives focused on code health, modularity, and system correctness.
• Expertise in building robust, tested, and maintainable software libraries and APIs.
• Strong proficiency in modern software development practices, including system design, agentic coding, testing frameworks, and continuous integration/delivery (CI/CD).
• Have contributed to a production data processing system.
• Experience building and maintaining core ML, data infrastructure, or numerical computing software (e.g., PyTorch, Numpy, Cuda, distributed systems).
• Experience going from early-stage prototype to a production environment.
• Experience at a Startup or National Lab.
• Have leveraged simulation for design or data generation purposes.