Senior Platform Engineer, UI Core & Luau

Showcify, Inc.; San Mateo (CA); On-site; USD 197,000 - 243,000; Full time

Benefits offered by this job

Equity compensation

Benefits

Job summary

Roblox in San Mateo, CA is seeking a Senior Software Engineer to design and build the UI platform that powers Roblox's experiences. You will work across frameworks, APIs, and component libraries to deliver fast, reliable user interfaces.

You will leverage Luau, React style patterns, and platform tooling to optimize rendering and startup performance on mobile and desktop. This role involves mentoring engineers and collaborating with product and design teams.

Qualifications

• 4+ years of professional experience building and shipping client applications, ideally on mobile (iOS, Android) or desktop
• Strong hands-on experience with React and a solid understanding of its component model, state management, and rendering behavior
• 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

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
• 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

Skills

React

React Native

Performance debugging

Feature flags

Tools

Luau

React Navigation

Job description

Roblox in San Mateo, CA is seeking a Senior Software Engineer to design and build the UI platform that powers Roblox's experiences. You will work across frameworks, APIs, and component libraries to deliver fast, reliable user interfaces.

You will leverage Luau, React style patterns, and platform tooling to optimize rendering and startup performance on mobile and desktop. This role involves mentoring engineers and collaborating with product and design teams.