Senior Front End Engineer
Core
Build and maintain the shared AI Platform services and Nutshell design system for Spare's transit products, serving millions of AI voice calls and tens of thousands of daily users.
Role type
Senior Front End Engineer (Design System & Platform)
Builds
Nutshell design system (tokens, shared components, patterns) and core UI foundations for emerging transit products
Domain
Transportation / Mobility / AI Platform
Required skills
React, TypeScript, modern CSS, component API design, data-dense interface development, design system adoption, cross-stack collaboration, AI-assisted development experimentation
Preferred skills
Transit/mobility/logistics domain experience, high-growth startup experience, design tooling proficiency, engineering mentorship
Technologies
React, TypeScript, modern CSS
Responsibilities
Own and extend the Nutshell design system; refactor existing frontend to establish organized UI foundations; shape system defaults for accessibility and consistency; fill un-designed gaps (empty states, keyboard behavior); enable team adoption via documentation and workshops
Seniority
Senior, hands-on IC
