The Foundation and Luau Platform team builds the shared platform that Confidential (Registered Users Only)'s user interface runs on. Our UI is written in Luau, Confidential (Registered Users Only)'s scripting language, using React-style frameworks. We own the core pieces that product teams across Confidential (Registered Users Only) rely on: a component library used across Confidential (Registered Users Only)'s 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 Confidential (Registered Users Only)'s 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 Confidential (Registered Users Only) 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