Principal Software Engineer, Physics (C++)

Location: The posting references Roblox headquarters in Vancouver, BC, Canada, but does not explicitly confirm that this specific role is based there. Office-based roles are onsite Tuesday through Thursday, with optional presence on Monday and Friday.

Company

Roblox builds a platform, tools, and 3D immersive digital experiences for a global community of developers and creators.

What you will do

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

Requirements

• 8+ years of professional experience developing high-performance C++ software, 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 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

• Work on large-scale 3D experiences used by tens of millions of people.
• Full-time employees are eligible for equity compensation and benefits.
• Reasonable accommodations are available during the recruiting process.
• For US-based roles, certain US visa categories may not be supported and future H-1B sponsorship may not be available.