Principal Software Engineer, Physics

Achieve Dynamic Experiences

The Physics team develops Roblox's proprietary distributed physics engine. Our team implements the mathematical models behind our dynamic simulation engine, and ships engine APIs and tools that developers use every day. These models incorporate rigid body dynamics arising from external forces, collisions, and constraints while optimizing for real-time performance. We work on integrating the low level physics solver into the rest of the engine for online gameplay across multiple platforms.

Responsibilities

• Innovate and implement powerful physics features that empower Roblox developers to create immersive and dynamic experiences.
• Drive innovation through research and rapid prototyping, translating new ideas into practical solutions that stand the test of time.
• Optimize and enhance the robustness and performance of the physics engine and its integrations, ensuring a seamless user experience.
• Collaborate with internal teams and external developers, providing expert support and guidance to improve feature utilization and resolve technical challenges.

Requirements

• Extensive C++ Development: 8+ years of professional experience writing high-performance, optimized C++ code (2+ years if with an advanced degree).
• Performance Engineering: Demonstrated ability to use multithreading and SIMD optimization techniques to enhance application efficiency with knowledge of modern computer architecture and its impact on software performance.
• Physics and Numerical Methods Experience: Practical experience applying numerical methods to solve problems in real-time physics simulation.
• Real-Time Physics Expertise: Proven experience developing and deploying real-time and online multiplayer physics simulations.
• Physics SDK Familiarity: Hands-on experience integrating and applying physics SDKs such as PhysX, Havok, and Bullet.

Qualifications

• Education: Bachelor's or advanced degree in Computer Science, Mathematics, Physics, Engineering, or equivalent demonstrated experience.

Benefits

• Equal Employment Opportunity: Roblox provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Pay

The starting base pay for this position is as shown below. The actual base pay is dependent upon a variety of job-related factors such as professional background, training, work experience, location, business needs and market demand. Therefore, in some circumstances, the actual salary could fall outside of this expected range. This pay range is subject to change and may be modified in the future. All full-time employees are also eligible for equity compensation and for benefits as described on this page.

Schedule

Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).