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About the role: The Geometry team in the Roblox Engine organization builds the foundational technology that all Roblox worlds and avatars are made of. We focus on how complex 3D geometry is created, stored, and streamed so that experiences can be larger, more detailed, and more dynamic, while still running well on a wide range of devices.

Within Geometry, the Geometry Scalability team owns the engine technologies that let creators build:

• Huge, dense environments that still perform on lowend mobile devices
• Highfidelity avatars and articulated models that stream smoothly as players move through a world
• Consistent, high-quality visuals, whether content starts as parts, voxels, or meshes

Today, the team works on systems such as:

• SLIM (Scalable Lightweight Interactive Models) - our format and pipeline for streaming large composite models with automatic levels of detail for both worlds and avatars
• Geometry generation and clustering frameworks used to combine, simplify, and stream complex scenes efficiently
• Mesh levelofdetail and evaluation pipelines that balance visual quality and performance across devices

We partner closely with Rendering, Avatar, Physics, Content Platform, and Engine Infra to deliver multiyear scalability initiatives that shape the future of the Roblox platform.

You will:

• Lead and grow the Geometry Scalability team - a group of senior and staff C++ engineers working at the intersection of real-time graphics, geometry processing, and large-scale systems - and own the vision, roadmap, and execution for systems like SLIM and our geometry generation and level-of-detail pipelines.
• Evolve geometry scalability over a 1-3 year horizon, driving new algorithms and architectures in areas such as mesh simplification, level-of-detail generation, and scalable skinning/transcoding pipelines - extending today's capabilities from static environments to avatars, articulated models, and animated content like vehicles and interactive props.
• Own end-to-end delivery for geometry scalability systems - design, implementation, testing and performance validation, rollout, monitoring, and long-term maintenance - with clear execution practices that lead to predictable, high-quality results.
• Coordinate across teams including rendering, avatar, physics, and content platform, ensuring dependencies are understood and risks are managed early, and partner with research and senior individual contributors to translate cutting-edge techniques into robust, production-quality engine features.

You have:

• 4+ years of engineering management experience, including leading senior and staff engineers on complex engine or platform projects.
• A proven track record of shipping largescale C++ engine or realtime 3D systems (for example, game engines, graphics or geometry pipelines, simulation, or large content platforms).
• Experience owning a multiquarter or multiyear technical roadmap that required crossteam coordination, staged rollouts, and ongoing iteration on performance and quality.
• Strong background in 3D computational geometry and numerical methods: mesh processing, levelofdetail generation, geometry simplification, and linear algebra.
• Deep expertise in modern C++ and lowlevel performance optimization on CPU and/or GPU, ideally in realtime engines or largescale rendering/geometry pipelines.
• Familiarity with skinning, animation, and avatar systems (bones, accessories, layered clothing) and how they integrate into geometry and streaming pipelines is a strong plus.
• Demonstrated ability to build and maintain a healthy team culture: clear expectations, predictable delivery, psychological safety, and direct, constructive feedback.

You are:

• Someone who has experience working directly with or building for usergenerated content ecosystems or creator platforms where scalability, robustness, and backwards compatibility are critical.
• Background with scalable content streaming systems, such as cloudbased content transcoding and delivery pipelines for 3D assets.
• Prior contributions to graphics, geometry, or simulation research (for example, publications or conference talks) or experience productionizing such techniques in shipped products.