Principal Software Engineer (C++)

TL;DR

Principal Software Engineer, Engine Systems (C++/Game Engine): Building and optimizing foundational DataModel systems, reflection bindings, and serialization components for the Roblox Engine with an accent on systems-level C++ development, performance, and cross-platform execution. Focus on designing engine internals, generating Luau API bindings, and solving low-level memory, CPU, and scalability challenges across desktop, mobile, and console devices.

Location: Hybrid work from the Roblox headquarters in San Mateo, California, with office attendance required Tuesday through Thursday; Monday and Friday presence is optional. This is a US-based role, and certain US visa categories may not be supported.

Company

Roblox develops a 3D immersive platform and tools that enable a global community of creators and developers to build interactive experiences.

What you will do

• Develop high-performance engine code for user-created games across the Roblox platform.
• Build and maintain core DataModel systems and data structures.
• Develop C++ reflection bindings and code-generation tooling for the Engine’s Luau API.
• Design and maintain DataModel serialization systems.
• Own projects throughout their full lifecycles and collaborate with other engineering teams on universal solutions.
• Optimize engine performance across desktop, mobile, and console devices.

Requirements

• Outstanding systems-level C++ programming experience.
• Experience working on game engine internals.
• Experience building and maintaining systems that operate optimally at scale.
• Strong understanding of smart pointers, templates, virtual functions, and structured and raw memory.
• Curiosity and commitment to staying current with technology developments.
• Ability to work in a hybrid schedule from the San Mateo headquarters three days per week.

Culture & Benefits

• Work on technical challenges involving large-scale human interaction and shared 3D experiences.
• Full-time employment includes equity compensation and employee benefits.
• Reasonable accommodations are available during the recruiting process for qualifying disabilities or religious beliefs.
• Equal employment opportunities are provided without discrimination or harassment.