Principal Software Engineer, Physics

Location: San Mateo, California, United States. Office-based roles are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday.

Company

Roblox builds a platform and tools for creating and experiencing 3D immersive digital environments.

What you will do

• Develop physics features for immersive and dynamic Roblox experiences.
• Research, prototype, and translate new physics concepts into production solutions.
• Optimize the robustness and performance of the distributed physics engine and its integrations.
• Integrate the low-level physics solver with the engine for online gameplay across multiple platforms.
• Collaborate with internal teams and external developers to support feature adoption and resolve technical challenges.

Requirements

• 8+ years of professional experience writing high-performance C++ code, or 2+ years with an advanced degree.
• Experience with multithreading, SIMD optimization, modern computer architecture, and performance engineering.
• Practical experience applying numerical methods to real-time physics simulation.
• 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, Engineering, or equivalent experience.

Culture & Benefits

• Full-time employees are eligible for equity compensation and benefits.
• Equal employment opportunities and reasonable accommodations are provided during the recruiting process.
• The company may not be able to employ candidates requiring certain U.S. visa categories or support future H-1B sponsorship.