4+ years building production web UI with React and TypeScript
Strong CSS fundamentals including layout and responsive design
Experience with design systems and component architecture
Proficient in data visualization libraries like Recharts or D3
Knowledge of accessibility standards and practices
Fluency in Figma for design handoff and prototyping
Ability to transition concepts from design to production code efficiently
Responsibilities
Build production UI for the web app using React and TypeScript
Lead and maintain the Summation Design System
Prototype product ideas in code and validate with real data
Craft motion and micro-interactions to enhance UX
Convert Figma designs into robust, testable UI components
Optimize UI performance through strategic coding practices
Collaborate with data visualization efforts for clarity in financial concepts
Establish coding quality standards and mentorship for the team
Benefits
Collaborative startup environment with a high-context team
Opportunity to influence product design and performance
Focus on accessibility and user-centered design principles
Engagement in fast prototyping and innovative coding practices
Mentorship and continuous learning opportunities within the team
Full Job Description
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
