Senior Software Engineer (Foundation & Luau Platform)

Join Roblox as a Senior Software Engineer on the Foundation and Luau Platform team. You will design and build the frameworks and APIs that power Roblox's user interface, ensuring fast, consistent, and reliable performance. You will work across systems, platforms, and infrastructure, driving adoption of the platform and raising the quality bar through code review, test coverage, and documentation. Ideal candidates have 4+ years of experience in client application development, a strong foundation in application architecture, and experience with React and mobile development.

Experience supporting other engineers in adopting a shared platform, through documentation, migration guides, or direct developer support

USD 196,750 - 243,290

Responsibilities

• Design and build the frameworks and APIs that Roblox's UI is built on, including layout and navigation systems, server-driven UI, and a shared component library.
• 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.
• 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.
• Experience designing shared frameworks, UI platforms, or core libraries that other engineers build on

Requirements

• 4+ years of professional experience building and shipping client applications, ideally on mobile (iOS, Android) or desktop, with a strong foundation in application architecture
• A solid understanding of client rendering and layout performance across multiple screen sizes, form factors, and orientations
• 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
• Comfort working in a large, evolving codebase and migrating legacy code incrementally
• Strong debugging and profiling skills, with experience diagnosing performance issues such as slow startup, visual stutter, and memory pressure
• Strong written and verbal communication skills, and the ability to align multiple teams around a technical plan
• Experience with feature flagging, staged rollouts, and experiment-driven launches

Experience with Luau or Lua

• 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

Preferred

• Experience with React Navigation or comparable routing libraries