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cmux
Founding Chromium Engineer
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Tailor resume
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Salary
$130k – $170k
Location
San Francisco
Work mode
on-site
Type
full-time
Company size
1+ people
First seen
2w ago
Last seen
2d ago
What you’ll do
•
Build frontier devtools across the stack: cmux macOS (Swift/AppKit), cmux Windows/Linux (C++/Chromium), cmux iOS, cmux Cloud, sub-router (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.
Things that make us extra excited:
•
Using 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.
Benefits
Compensation
: $130k–$170k + 0.5%–1.5% equity
Benefits
: Health, dental, and vision insurance
Location
: San Francisco
Email
YC Work at a Startup
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.
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.
Compensation
: $130k–$170k + 0.5%–1.5% equity
Benefits
: Health, dental, and vision insurance
Location
: San Francisco
Email
YC Work at a Startup
What you’ll do
•
Own our Chromium fork: track upstream, rebase cleanly, and carry cmux patches (window/input/render integration, terminal surface, agent UI).
•
Own cmux on Windows and 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.
Things that make us extra excited:
•
Deep C++ and real Chromium work - ideally you’ve maintained a fork: carrying patches, rebasing on upstream milestones, debugging in content/ or blink.
•
Rust is 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.
Compensation
: $130k–$170k + 0.5%–1.5% equity
Benefits
: Health, dental, and vision insurance
Location
: San Francisco
Email
YC Work at a Startup
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