• Pair with and support the existing UI Platform engineer to deliver platform roadmap items and operational improvements. • Design, build, and maintain reusable UI components, patterns, and utilities with a focus on composability, accessibility, and performance. • Own platform-level features (component library, tokens, theming, Storybook, docs, test harnesses) and contribute to architecture and standards. • Improve developer experience for product teams using the platform: scaffolding, documentation, linting, and CI checks. • Add automated tests (unit, integration, visual regression) and enforce quality gates. Optimize build and runtime performance for components and pages. • Collaborate cross-functionally with product designers, product managers, and backend engineers to ensure components meet UX and performance goals. • Review code, mentor teammates, and evangelize best practices for front-end engineering and design systems. • Participate in planning processes — help shape the roadmap.