Founding Engineer

cmux · San Francisco, CA, US · In-office · Posted 18d ago

$130k - $170k

Open source applied AI lab building next-gen devtools

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](https://cmux.com) and on [GitHub](https://github.com/manaflow-ai/cmux).\ \ We're hiring talented founding engineers to help us build the future of coding with AI.

### **What you'll do**

\- Build frontier devtools across the stack: cmux macOS (Swift/AppKit), cmux TUI (Rust), cmux Windows/Linux (C++/Chromium), cmux iOS, cmux Cloud, subrouter (Go), chatmux, and more

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

\- Own products and features end to end, including user feedback loops

\- Dogfood, test, and verify constantly; use cmux to build cmux

### **Who we're looking for**

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

Things that make us extra excited:\ \ \- You use 10B+ tokens a day

\- All-rounders and creative problem solvers

\- Great design taste and care for the craft

\- Swift/AppKit, C++, Rust, Go, or Chromium experience

\- Open-source maintainers, former founders, people who ship complete products

\- Sending cmux PRs for us to review or demoing custom cmux plugins / workflows

### **Details**

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

\- Benefits: Health, dental, and vision insurance

\- Location: San Francisco

Apply on cmux's site