Founding Chromium Engineer
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Before you apply
Salary$130k – $170k
LocationSan Francisco, California, US
Work modeon-site
SeniorityLead
EquityIncluded
Company size1–10 people
First seenSep 30, 2026 · 1mo ago
Verified live3d ago
At a glanceSummarised by Seekless from the posting.
Deep C++ and real Chromium work, with experience maintaining a fork: carrying patches, rebasing on upstream milestones, debugging in content/ or blink
Experience shipping or maintaining a Windows desktop app
Rust experience
Upstream Chromium contributions
Swift/AppKit curiosity
Open-source maintainer experience
Founder experience
Skills
C++
Chromium
Rust
Swift
AppKit
Ghostty
Benefits
Health insurance
Dental insurance
Vision insurance
About the company
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.
About the role
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 founder
Details
•
Compensation: $130k - $170k + 0.5% - 1.5% equity
•
Benefits: Health, dental, and vision insurance
•
Location: San Francisco
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