About the role

cmux is a native macOS terminal built on Ghostty, designed for running multiple AI coding agents in parallel. Hundreds of thousands of developers use cmux to drive their agentic coding workflows.

Check us out at cmux.com and on GitHub.

We're hiring a talented founding designer to help us design the future of coding with AI.

What you’ll do

- Design frontier devtools across the stack: cmux macOS, cmux TUI, cmux Windows/Linux, cmux iOS, cmux Cloud, cmux.com, chatmux, and more

- Help design the most useful product for developers to do work with AI

- Own the look, feel, and interaction model end to end, including user feedback loops

- Dogfood, prototype, and ship constantly

Who we're looking for

No hard requirements. We want talented designers from any background.

Things that make us extra excited:

- You are a walking encyclopedia of design components from all sorts of apps

- People come to you for design references all of the time

- Obsessive taste for native macOS apps and developer tools

- You prototype in code and ship real UI

- Typography, motion, and systems thinking; you care about the 1px details, padding, etc

Details

- Compensation: 130k - 170k + 0.5% - 1.5% equity

- Benefits: Health, dental, and vision insurance

- Location: San Francisco

About cmux

cmux is an open source native macOS terminal built on Ghostty. Vertical tabs, notification rings when agents need attention, split panes, and a CLI for programmability.