Founding Design Engineer: End-to-End AI Revenue UI

Trycardinal; San Francisco (CA); On-site; USD 150,000 - 210,000; Full time

Job summary

Cardinal is seeking a founding design engineer to shape the entire user experience, from first impression to daily use. You will ship production UI in React/TypeScript and define how revenue agents look, feel, and behave, not just produce mockups.

You will own the intersection of product, design, and code, building a scalable design system and onboarding flows that reduce time-to-value. Expect a fast-moving, founder-led environment where speed and clarity matter.

Qualifications

• A former founder
• An early design engineer at a startup
• Someone who has designed, built, and shipped products end-to-end

Responsibilities

• Define how Cardinal feels end-to-end, from first impression to daily use
• Design and build: ship production UI, not just mockups
• Shape how people build, run, and trust revenue agents: what agents surface, when they ask for input, and how customers steer them
• Turn complex, multi-step workflows into interfaces that feel obvious

Skills

Product design

UI design

Systems thinking

High agency

Tools

React

TypeScript

Job description

Cardinal is seeking a founding design engineer to shape the entire user experience, from first impression to daily use. You will ship production UI in React/TypeScript and define how revenue agents look, feel, and behave, not just produce mockups.

You will own the intersection of product, design, and code, building a scalable design system and onboarding flows that reduce time-to-value. Expect a fast-moving, founder-led environment where speed and clarity matter.