Software Engineer, Design Systems

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.

- 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

- Has 3+ years of experience building frontend products , with meaningful ownership over architecture and technical direction

- Has owned or significantly evolved a design system used across multiple teams or products

- Has deep frontend expertise , including TypeScript, component architecture, and modern frontend tooling.

- Has raised the quality bar of a product , improving performance, accessibility, usability, and interaction design

- Has strong product and design instincts , with a sharp eye for craft and user experience

- Communicates clearly and collaborates effectively , especially across engineering and design

- Is excited about AI-assisted development workflows , and how design systems can help guide and accelerate AI-generated code

- 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

- Monthly credits for professional development, general wellness, Assembled customers, and commuting

- Catered lunches every day (M-F) and fully stocked SF office

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. Stock options are provided as part of the compensation package, in addition to a full range of medical, financial, and/or other benefits, dependent on the position offered.