Engine Scalability Engineer – Real-Time 3D (C++)

Roblox; San Mateo (CA); On-site; USD 153,000 - 197,000; Full time

Job summary

Roblox in San Mateo, CA is seeking an Engine Scalability Engineer to design and ship 3D engine systems for avatars and environments while collaborating with Rendering, Avatar, Studio and external developers to deliver high-fidelity, scalable experiences across devices.

The role demands 3+ years in high-performance systems, strong C++, and a real-time performance mindset; you will own end-to-end projects, optimize for mobile and contribute to code health.

Qualifications

• 3+ years of professional experience in high-performance systems.
• Deep proficiency in C++ in large codebases.
• Experience diagnosing CPU/GPU tradeoffs on mobile/console.
• Hands-on 3D systems/real-time rendering experience.
• Ownership of end-to-end work in ambiguous situations.
• Strong collaboration and communication across teams.

Responsibilities

• Design and ship 3D engine systems for avatar and environment geometry.
• Collaborate with Rendering, Avatar, Studio and external developers.
• Profile and improve performance across devices, focusing on mobile.
• Drive projects end-to-end and maintain code health.

Skills

C++ experience

Real-time systems

3D rendering

Ownership

Collaboration

Cross-team communication

Job description

Roblox in San Mateo, CA is seeking an Engine Scalability Engineer to design and ship 3D engine systems for avatars and environments while collaborating with Rendering, Avatar, Studio and external developers to deliver high-fidelity, scalable experiences across devices.

The role demands 3+ years in high-performance systems, strong C++, and a real-time performance mindset; you will own end-to-end projects, optimize for mobile and contribute to code health.