Software Engineer, Design Systems

ABOUT ASSEMBLED Great customer support requires human agents and AI in perfect balance, and Assembled https://www.assembled.com/customers is the only unified platform that orchestrates both at scale. Companies like Canva, Etsy, and Robinhood use Assembled to coordinate their entire support operation — in-house agents, BPOs, and AI — in a single operating system. With AI Agents that resolve cases end-to-end, AI Copilot for agent assistance, and AI-powered workforce management that optimizes both human and AI capacity, Assembled helps teams deliver faster, better service while making smarter decisions about how to staff and automate. Backed by $71M from NEA, Emergence Capital, and Stripe, we're building the platform that makes AI and human collaboration actually work. THE ROLE At Assembled, we're rebuilding how design and engineering create products from the ground up — a brand-new design system and the AI-native workflows that bring it to life. We're looking for a Software Engineer to lead the technical vision for that work: defining the architecture of the system, building the infrastructure around it, and helping shape the next generation of design-to-code workflows. Working closely with our Design Systems Designer, you'll make foundational decisions that influence every product team at Assembled — from component APIs and token architecture to performance, accessibility, developer experience, and how AI coding agents generate production-quality UI. WHAT YOU'LL DO - Own the technical direction of our design system, from token architecture and components to tooling, testing, and adoption - Shape how AI coding agents build UI, through component APIs, documentation, guardrails, and developer workflows - Modernize our frontend foundations, including component architecture, tooling, and development patterns - Raise the bar for frontend quality, including performance, accessibility, responsiveness, and interaction detail - Build the infrastructure that keeps the system re