Software Engineer, Design Systems
About 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.
Responsibilities
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 reliable at scale, including testing, visual regression, CI/CD, and versioned releases
Establish frontend best practices across teams, helping engineers build more consistent, maintainable, and high-quality user experiences
Influence product decisions early, surfacing technical constraints, tradeoffs, and opportunities throughout the design process
Requirements
3+ years of experience building frontend products, with meaningful ownership over architecture and technical direction
Meaningful ownership over a design system used across multiple teams or products
Deep frontend expertise, including TypeScript, component architecture, and modern frontend tooling
Improving performance, accessibility, usability, and interaction design
Strong product and design instincts, with a sharp eye for craft and user experience
Clear communication and effective collaboration, especially across engineering and design
Excitement about AI-assisted development workflows and how design systems can help guide and accelerate AI-generated code
Qualifications
Nice to have: Experience with our full stack: React, Storybook, and data visualization libraries such as visx, D3, or Chart.js
Experience building B2B SaaS or highly interactive, data-rich applications
Skills
Frontend development skills
Design system ownership
AI integration
Infrastructure and tooling
Quality assurance
Product and design thinking
Benefits
Generous medical, dental, and vision benefits
Flexible time off
Monthly credits for professional development, general wellness, Assembled customers, and commuting
Paid parental leave
Catered lunches every day (M–F) and fully stocked SF office
401(k) plan enrollment
Pay
The estimated base salary range for this role is $160,000 - $270,000 per year. The base pay offered may vary depending on location, job-related knowledge, skills, and experience.
Schedule
Full-time