Every day, tens of millions of people come to Roblox to explore, create, play, learn, and connect with friends in 3D immersive digital experiences– all created by our global community of developers and creators.

At Roblox, we’re building the tools and platform that empower our community to bring any experience that they can imagine to life. Our vision is to reimagine the way people come together, from anywhere in the world, and on any device.We’re on a mission to connect a billion people with optimism and civility, and looking for amazing talent to help us get there.

A career at Roblox means you’ll be working to shape the future of human interaction, solving unique technical challenges at scale, and helping to create safer, more civil shared experiences for everyone.

As a Principal Software Engineer for Engine UI on Roblox, you will work on our state-of-the-art game engine, building out User Interface capability across all of Roblox. This position enables our game developers to unlock, accelerate, and promote the creation of high quality, performant UI that empowers meaningful interaction.

You will:

• Develop and maintain our C++ engine code that powers the foundational UI features in the world’s most popular games, as well as the Roblox App and Roblox Studio

• Author and review API proposals to expose UI capability to Luau, our fast, Lua-derived scripting language that powers user-generated creation

• Partner closely with our game developer community to help achieve their creative vision, address concerns, and resolve bugs

• Innovate upon our text rendering and layout pipelines used by Roblox Developers and Players millions of times a day, interacting with our localization systems to provide engaging experiences worldwide

• Enhance and define layout schemes that dynamically adapt UI from mobile to 8k monitors, and even to VR

• Profile and write performant C++ code, creating scalable systems that drive feature-rich experiences, delivering high-quality, snappy UI across high end and low end devices

• Have fun learning what makes Roblox an amazing platform and place to work, while contributing to industry leading technologies

You have:

• 8+ years of professional development experience in C++ or related languages

• A performance-oriented mindset, being familiar with profilers (such as VTune, μProf, etc.), locating performance bottlenecks, and using data to measure the impact of your changes

• Previously worked in areas like browser/layout engines, game engines or other UI framework development systems. Examples: Web Kit, Chromium, Blink, Gecko, Unreal, Unity, UIKit, Android UI Framework, Qt, Yoga, React, Free Type, Harf Buzz, or your own UI framework project! (Preferred)

• Written systems that can be intuitively understood by developers of varying disciplines, such as engineers, game designers, and UI designers

• Familiarity with systems level 3D math, pointers, templates and memory management

• Some familiarity with graphics concepts and APIs such as Vulkan, Metal, and/or DirectX

• Worked on a variety of platforms like gaming consoles and/or mobile devices. (Preferred)

For roles that are based at our headquarters in San Mateo, CA: 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.

Annual Salary Range**$293,800—$343,340 USD**
Roles that are based in an office are onsite Tuesday, Wednesday, and Thursday, with optional presence on Monday and Friday (unless otherwise noted).

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. Roblox also provides reasonable accommodations to candidates with qualifying disabilities or religious beliefs during the recruiting process.