[Hiring] Senior Product Design Engineer @Cal.com

Role Description

We’re hiring a Senior Product Design Engineer to own core product surfaces end to end, from the first sketch to production-grade components running in the browser.

• You’re a product designer at your core, with substantial evolution into design engineering.
• Code is where you do your best design work; we care more about what you can build than your design files.
• You build and own your own components, designing and engineering beautiful, well-considered primitives yourself.
• We build on coss ui, our open-source component library built on Base UI, treating the design system as a product in its own right.

What You’ll Do

• Own core product surfaces from concept through production-ready components: booking flows, scheduling primitives, team and enterprise surfaces.
• Build and test working prototypes in code with whatever answers the question fastest.
• Hand off primitives that product engineers use directly across Cal.com’s product surfaces, with correct semantics and real states.
• Design, build, and own your own components instead of relying on third-party, publicly available ones.
• Continually improve coss ui: audit what exists, close the gaps, refine the primitives, and land new components in the library.
• Keep the system honest: tokens, spacing, states, dark mode, motion.
• Apply motion with intent, knowing when animation clarifies and when it gets in the way.
• Own the outcome, framing the hypothesis, defining success, and reading the results.
• Hold the accessibility bar: keyboard paths, focus management, semantics, contrast, motion preferences.
• Sweat the last 10%: empty states, error copy, loading behavior, motion.
• Work in the open with the Head of Product and Design Engineer, sharing early and inviting critique.
• Write your thinking down; async means the doc, the Loom, and the prototype are the meeting.

Qualifications

• A product designer at your core who has evolved substantially into design engineering.
• Exceptional craft, and the engineering ability to ship it: HTML, CSS, TypeScript, React.
• Deep expertise in headless primitive composition (Base UI, Radix, or similar).
• A strong grasp of motion design principles in UI.
• Experience working with AI tooling daily (Claude Code, Cursor, v0).
• Deep familiarity with web standards and platform primitives.
• Real design systems experience: built and maintained one.
• Real accessibility knowledge: WCAG, ARIA, assistive tech.
• Understanding of the architecture of what you’re designing: APIs, data models, state.
• Collaborative by default, showing unfinished work and taking critique well.
• Strong written communication (clarity > formality).
• High trust, high autonomy mindset; thrives async.

Bonus Skills

• Open-source contributions and publicly available side projects.
• Familiarity with Cal.com, scheduling, calendaring, or the mess of timezones and recurrence rules.
• Working knowledge of locale- and time-aware APIs like Intl.DateTimeFormat.

Compensation

$100,000 – $150,000, same salary regardless of where you live. Equity included.

Benefits

• Work from anywhere, anytime: fully remote & async.
• Earn the same salary no matter where you live.
• No standups, no micromanagement, no unnecessary calls.
• Real flexibility: take time for life stuff, no approval needed.
• Work in your own flow, pajamas welcome.
• 30 paid OOO days per year (wherever you are in the world).
• Yearly team retreats in beautiful locations.
• People-first culture: stable, family-friendly, kind.

How to Apply

Send us the work. A repo, a component library, a side project you built because you wanted it to exist. Show us something you obsessed over and tell us why. We care more about what you’ve shipped than where you shipped it.