Senior Design Engineer
Summation Inc
Senior Design Engineer
Design Engineering at Summation lives at the intersection of product design and frontend engineering. As a Senior Design Engineer, you will ship beautiful, high-performance product experiences in production code, lead our design system, prototype new interactions, and raise the bar on accessibility, motion, and polish. You will partner closely with Product, Design, and Engineering, moving from Figma to code to shipped features.
Roles & Responsibilities
- Build production UI in React and TypeScript for Summation's web app
- Lead the Summation Design System: tokens, components, theming, accessibility, docs, and release workflow
- Prototype end-to-end product ideas in code, validate with real data, and graduate winners into production
- Craft motion and micro-interactions that clarify meaning and reduce cognitive load
- Translate flows and states from Figma into resilient, testable components with strong state management
- Drive UI performance: bundle hygiene, code-split plans, rendering strategy, perceived latency
- Partner with data visualization to express complex financial concepts with clarity
- Establish guardrails: lint rules, Storybook checks, accessibility checks, visual regression in CI
- Mentor engineers and designers on interaction patterns, system thinking, and front-of-frontend craft
- Contribute to product quality across the stack through reviews, pairing, and high-signal documentation
You will love this role if you
- Love working across design and code, and care about the details users feel
- Think in systems: tokens, states, variants, docs, upgrade paths
- Prototype ideas fast and are comfortable deleting code after an experiment
- Believe accessibility, performance, and clarity are product features
- Enjoy collaborating with PMs, designers, and backend engineers in a high-context startup
Required experience
- 4+ years building production web UI with React and TypeScript
- Strong CSS fundamentals: layout, fluid type and spacing, responsive systems, motion
- Design system experience: tokens, component architecture, Storybook, documentation
- Data visualization in production using one of Recharts, D3, Visx, ECharts, or similar
- Accessibility and quality: semantic HTML, WCAG basics, keyboard and screen reader support, automated checks
- Figma fluency: components, variants, auto-layout, dev mode, and handoff
- Proven ability to take a concept from Figma to shipped code without heavy PM overhead
Nice to have
- Remix or Next.js, Tailwind, shadcn/ui
- Framer Motion for interaction design
- WebGL or Canvas experience for advanced interactions
- Visual regression and accessibility tooling in CI
- Experience in fintech, analytics, or complex data products
Vacancy posted 4 days ago
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