This is a high-ownership, founding-team role at the intersection of consumer hardware, real-time AI inference, and emotional intelligence.
The company is building a first-of-its-kind wearable that reads and interprets a user's emotional state in real time — think a fitness tracker, but for your emotions and cognitive performance.
You'll be the primary builder of the consumer-facing mobile experience, translating sophisticated AI model outputs (energy, mood, focus signals derived from audio and biometric data) into intuitive, beautiful interfaces.
This role comes with significant equity upside and a clear path to leading mobile engineering as the company scales.
The team is distributed, with presence in San Francisco and London.
This role is based in London, with flexibility for hybrid or remote working arrangements.
What You'll DoOwn the companion iOS app end-to-end — architecture, development, deployment, and ongoing iteration.
Surface real-time emotional-state outputs from the company's proprietary AI inference model through clean, intuitive app interfaces.
Build and ship a polished, consumer-grade mobile experience that meets high product and design standards.
Integrate backend APIs covering authentication, data sync, and data models.
Make autonomous technical decisions as a founding engineer, setting patterns and standards for the mobile codebase.
What We're Looking ForRequired:3+ years of professional iOS development experience with Swift, with a proven track record of shipping production-ready, consumer iOS apps.
Demonstrated end-to-end ownership of mobile features — from concept through release and ongoing maintenance.
Strong full-stack capabilities including mobile app development and backend API integration.
Experience integrat.