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Salary: USD 153,120 - 196,750 / annual
Roblox is seeking a Software Engineer to join the Engine Scalability team, which builds the systems powering Avatars and Environments across the platform. The team's mission is to enable millions of developers to create large, high-fidelity worlds and multiplayer experiences that run smoothly on phones and low-end devices—a CEO-level priority for how Roblox evolves from kids' games to experiences for all ages.
In this role, you will design and ship 3D engine systems for avatar and environment geometry, including mesh processing, level of detail (LOD), transcoding, streaming, runtime loading, and related performance systems. You'll partner closely with Rendering, Avatar, and Studio teams, as well as external developers, to ensure the features you build are directly usable for creating amazing experiences. A key focus is profiling and improving game engine performance across a wide range of devices, with particular attention to mobile optimization. You'll drive projects end-to-end, collaborate with other engineers, and contribute to maintaining strong technical quality and code health.
The Engine Scalability team is responsible for the technical foundation that allows Roblox experiences to evolve from simple platformers into massively multiplayer, open-world, AAA-quality games. Your work will directly impact how the platform scales to support higher-fidelity content while maintaining performance on constrained devices.
Roblox offers a hybrid work arrangement: onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday.
**Requirements:**
- 3+ years of professional experience building and shipping high-performance systems in domains such as game engines, real-time simulation, robotics, AR/VR, or similar
- Deep proficiency in C++, with a focus on writing clean, efficient, and maintainable code in large codebases
- Experience diagnosing tradeoffs among CPU/GPU time, memory, loading latency, visual quality, and frame-time stability on constrained platforms such as mobile or console
- Demonstrated hands-on experience building production systems involving real-time 3D rendering, mesh or geometry processing, LOD, animation/skinning, spatial data, 3D asset pipelines, or GPU/client performance (not required, but a major plus)
- Track record of driving work end-to-end when the problem wasn't fully specified: defining the approach yourself, seeing it through implementation, rollout, and production consequences
- Ability to work effectively across teams and explain complex technical topics clearly to different audiences
