Principal Software Engineer (Physics)

TL;DR

Principal Software Engineer (Physics): Developing and optimizing a proprietary distributed physics engine for a global 3D immersive platform with an accent on rigid body dynamics, real-time performance, and complex mathematical modeling. Focus on implementing high-performance C++ solutions, leveraging multithreading and SIMD techniques, and integrating physics solvers for seamless online multiplayer experiences.

Location: Onsite in Vancouver, BC, Canada (Hybrid: Tuesday–Thursday in office).

Company

Roblox is a global platform that empowers a community of developers and creators to build and connect through immersive 3D digital experiences.

What you will do

• Innovate and implement powerful physics features to enhance immersive and dynamic experiences.
• Drive research and rapid prototyping to translate new ideas into practical, long-term solutions.
• Optimize the physics engine for robustness and real-time performance using modern computer architecture.
• Collaborate with internal teams and external developers to resolve technical challenges and improve feature utilization.

Requirements

• 8+ years of professional experience in high-performance C++ development (or 2+ years with an advanced degree).
• Proven expertise in multithreading and SIMD optimization techniques.
• Practical experience applying numerical methods to real-time physics simulations.
• Hands-on experience with physics SDKs such as PhysX, Havok, or Bullet.
• Strong understanding of modern computer architecture and its impact on software performance.

Culture & Benefits

• Equity compensation eligibility for all full-time employees.
• Comprehensive benefits package provided for full-time staff.
• Collaborative environment focused on shaping the future of human interaction and digital safety.
• Hybrid work model with structured office days to foster team collaboration.