Senior Software Engineer, Foundation & Luau Platform

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 were 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. Were 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 youll 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.

The Foundation and Luau Platform team builds the shared platform that Robloxs user interface runs on. Our UI is written in Luau Robloxs scripting language using React-style frameworks. We own the core pieces that product teams across Roblox rely on: a component library used across Robloxs apps and tools server-driven UI the core app frame and navigation and the frameworks and libraries underneath them.

Our goal is to make that platform fast consistent and reliable for the engineers who build on it. As a Senior Software Engineer you will help shape and build it working across systems platforms and infrastructure.

You Will

• Design and build the frameworks and APIs that Robloxs UI is built on including layout and navigation systems server-driven UI and a shared component library
• Build and evolve the core systems beneath the UI such as navigation routing state management and data flow so features load quickly and behave consistently
• Drive startup performance transition smoothness and layout stability across the client on phones tablets and desktop using traces and telemetry to set measurable quality bars

• Roll out platform changes safely at scale using feature flags staged rollouts and side-by-side validation of old and new implementations with fast rollback when needed
• Drive adoption of the platform across Roblox by partnering with product design and feature engineering teams to guide them onto our frameworks and components and turning their feedback into a better platform
• Raise the quality bar through thoughtful code review strong test coverage and clear documentation and mentor other engineers

You Have

• 4 years of professional experience building and shipping client applications ideally on mobile (iOS Android) or desktop with a strong foundation in application architecture
• Strong hands-on experience with React and a solid understanding of how it works including its component model state management and rendering behavior ideally in an application setting such as React Native rather than purely web
• Experience designing shared frameworks UI platforms or core libraries that other engineers build on
• A solid understanding of client rendering and layout performance across multiple screen sizes form factors and orientations
• Strong debugging and profiling skills with experience diagnosing performance issues such as slow startup visual stutter and memory pressure
• Experience with feature flagging staged rollouts and experiment-driven launches
• Strong written and verbal communication skills and the ability to align multiple teams around a technical plan
• Comfort working in a large evolving codebase and migrating legacy code incrementally

Bonus Points

• Experience with Luau or Lua
• Experience with React Navigation or comparable routing libraries
• Experience with native mobile development on iOS or Android
• Experience with server-driven UI or dynamic UI delivery systems
• Experience building cross-platform applications that run on mobile desktop and console
• Experience supporting other engineers in adopting a shared platform through documentation migration guides or direct developer support

Required Experience:

Senior IC