Senior UX Engineer, StackOne

• 4+ yrs professional front-end engineering with a portfolio that focus on the details
• React & TypeScript at production scale; comfortable with hooks, suspense, and server components
• Deep CSS fluency (Tailwind or equivalent) and experience of modern browser APIs
• Proven track record building or migrating component libraries/design systems
• Strong performance tuning instincts: Lighthouse, Core Web Vitals, bundle analysis, code-splitting
• Familiarity with monorepo tooling (NX or Turborepo) and micro-frontend patterns
• Ability to dive into back-end code (Node, React-router, sveltekit) to remove perf bottlenecks, instrument metrics, or adjust API shape

Desirable

• StackOne’s product experience is our brand. As our first dedicated UX Engineer you will be the in-house authority on taste, polish, and performance
• You will own the component library, shape our micro-frontend architecture, and ensure that every pixel, motion, and millisecond of latency makes customers feel like they’re using the best-engineered platform on the market
• 80 % Front-end craft & design systems
• 20 % API-aware performance engineering
• Collaborate with our Designer to define & steward our design system – set the visual language, build reusable primitives, and maintain libraries that power every StackOne user interfaces
• Ship pixel-perfect UIs – React (primarily) plus; own theming, performance, and thoughtful motion
• Make performance a feature – instrument Core Web Vitals, budget bundle sizes, optimise hydration patterns, and chase performance where it matters
• Provide and maintain internal tooling as well as AI rules to allow every technical team to contribute to the front-end while aligning with the best practices you will help set
• Prototype & validate – turn product ideas into interactive proofs-of-concept that help PMs and designers converge on the right solution fast
• Champion taste & detail – host design-quality critiques, stamp out visual debt, and be the go-to voice when “good enough” isn’t
• What success looks like after 12 months:
• Design system adoption → 95 % of new UIs use shared components; visual regressions approach zero
• Performance wins → Median Time to Interactive < 2 s on main dashboard
• Developer velocity → Features squads ship UI changes 30 % faster thanks to reliable primitives and clear guidelines
• Brand perception → qualitative feedback from users celebrates both functionality and “feel”, proving we are delivering exceptional user experience