Principal Product Designer

Stardust is a design-led reproductive health app used by over 2 million monthly active users. We are hiring a Principal Product Designer to own the full design layer of Stardust, shaping the core product experience, design system, and driving growth through design efforts.

Responsibilities:

• Shape the Core Product Experience
• Lead design across all core features: cycle and temperature tracking, predictions, sleep, mood logging, pregnancy mode, and partner view
• Turn complex health data into interfaces that feel like art, never clinical. Set the bar for how health information should look and feel
• Write your own briefs, own the spec, and hand off clean enough to ship right
• Stay close to implementation and work directly with engineers to protect design intent through production
• Track what ships, review what works, report back
• Define and Evolve the Design System
• Own the Stardust design system end-to-end and evolve it as the product grows
• Maintain consistency and quality across iOS, Android, and web while respecting what makes each platform different
• Write contribution guidelines so engineers can build inside the system without you
• Drive Growth through Design
• Work with growth team to design A/B experiments on high-leverage funnel steps with a bias toward learning fast
• Build a modular component library so experiments don't require full redesigns
• Use data to find drop-off, form hypotheses, iterate

Requirements:

• Comfortable designing for both iOS and Android native apps as well as web. You understand the nuances of each platform and know when the rules differ
• 6+ years of product design experience, including significant time as the lead or sole designer on a consumer mobile app
• Exceptional visual craft. You make interfaces that feel alive, not just usable. Your work doesn't look like anyone else's
• You run your own process — you don't need a PM to write your brief or a manager to set your priorities
• Figma fluency. You've built and maintained design systems, not just used them
• A portfolio showing real range: systems thinking, complex health or data UI, growth surfaces, and rich visual design
• You know how to ship specs and prototypes. You know when to use what, and you follow through to production
• Strong point of view on what makes a product feel distinctive and you push back when something is generic
• Experience in health, wellness, femtech, or consumer subscription apps
• Interest in AI and how it's changing the design process
• Familiarity with motion and interaction design