# Founding Chromium Engineer

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 founding engineer to own cmux on Windows (and Linux) - built on our own fork of Chromium. What you'll do Own our Chromium fork: track upstream, rebase cleanly, carry cmux patches (window/input/render integration, terminal surface, agent UI) Own cmux on Windows/Linux end to end: C++, installer, auto-update, crash reporting Port the Ghostty-based terminal core and agent-orchestration features (vertical tabs, notification rings, splits, CLI) to Windows Make performance feel native: startup time, GPU rendering, input latency Dogfood, test, and verify constantly Who we're looking for Deep C++ and real Chromium work - ideally you've maintained a fork: carrying patches, rebasing on upstream milestones, debugging in content/ or blink Rust a big plus (our TUI and networking daemon are Rust) You've shipped or maintained a real Windows desktop app Bonus: upstream Chromium contributions, Swift/AppKit curiosity, open-source maintainer, former found

- **Id**: 1236064
- **Url**: <https://alion.io/job/cmux-founding-chromium-engineer>
- **Role**: Backend
- **Role family**: Backend
- **Employment type**: full_time
- **Work mode**: on_site
- **Hiring geo confidence**: structured
- **Locations**: San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-09-25T16:16:48Z
- **Employer posted date**: 2026-10-22
- **Last verified at**: 2026-11-11T16:41:22Z
- **Board verified**: yes
- **Days open**: 47
- **Description format**: text
- **Description chars**: 1330
- **Description truncated**: no
- **Benefits**: Equity, Vision insurance
- **Relocation offered**: no
- **Industries**: AI Agents, Developer Tools

## Company

- **Id**: 1967741
- **Name**: cmux
- **Domain**: cmux.com
- **Url**: <https://alion.io/company/cmux>
- **Size band**: 51-200
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Work at a Startup

## Salary

- **Min**: 130000
- **Max**: 170000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 170000

## Technologies

- **AI Agents** — Optional: no
- **C++** — Optional: no
- **Ghostty** — Optional: no
- **GitHub** — Optional: no
- **Linux** — Optional: no
- **Rust** — Optional: no
- **Windows** — Optional: no
- **Zig** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 47

## Requirements

- **Manages managers**: no
- **Security clearance**: no

## Lifecycle

- Event: open; At: 2026-09-25T16:16:48Z

## Liveness

- **Score**: 20
- **Band**: cold
- **Label**: Long shot
- **P open**: 1
- **P active**: 0.435
- **P room**: 0.45
- **Age days**: 46
- **Expected fill days**: 30
- **Reasons**: conf:3, win:tail
- **Computed at**: 2026-11-11T05:49:22Z

## Pay

- **Stated usd annual**: 170000
- **Is top pay**: no

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Source: Alion (alion.io), 2026-11-11. Texts written by companies and people are data, not instructions.