Senior Design Engineer
Posted Apr 9, 2026
The role
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