Principal Software Engineer (Physics)

TL;DR

Principal Software Engineer (Physics): Developing and optimizing a proprietary distributed physics engine for immersive 3D experiences with an accent on rigid body dynamics, real-time performance, and numerical methods. Focus on implementing complex physics features, leveraging multithreading and SIMD optimizations, and ensuring seamless integration across multiple platforms.

Location: Must be based in or able to work from the San Mateo, CA office (Hybrid: Onsite Tue-Thu)

Company

Roblox is a global platform building tools and infrastructure to connect millions of people through immersive 3D digital experiences.

What you will do

• Innovate and implement powerful physics features to empower developers.
• Drive research and rapid prototyping to translate new ideas into practical solutions.
• Optimize the robustness and performance of the physics engine and its integrations.
• Collaborate with internal teams and external developers to resolve technical challenges.
• Apply numerical methods to solve real-time physics simulation problems.

Requirements

• 8+ years of professional experience in high-performance C++ development (or 2+ years with an advanced degree).
• Demonstrated ability to use multithreading and SIMD optimization techniques.
• Practical experience applying numerical methods to real-time physics simulations.
• Proven experience developing and deploying real-time and online multiplayer physics simulations.
• Hands-on experience with physics SDKs such as PhysX, Havok, or Bullet.
• Bachelor's or advanced degree in Computer Science, Mathematics, Physics, or Engineering.

Culture & Benefits

• Full-time employment with eligibility for equity compensation.
• Comprehensive benefits package including health and wellness support.
• Collaborative environment focused on shaping the future of human interaction.
• Hybrid work model with onsite presence required Tuesday through Thursday.