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About the Role
This is a founding engineering opportunity at a Y Combinator - backed consumer wearable startup operating at the intersection of biometrics, emotional intelligence, and mobile software. The company is building a wearable device that reads emotional states in real time - think of it as a fitness tracker, but for your EQ - powered by a proprietary computational neuroscience inference model processing over 150 audio and biometric signals.As the Founding Full-Stack iOS Engineer, you will own the companion iOS app end-to-end. This is a high-ownership, high-impact role: you'll be one of the first engineers at the company, expected to grow into a leadership position as the team scales.
Prototypes are already on users' wrists - this is a real product with real momentum.What You'll DoOwn the companion iOS app end-to-end, from architecture decisions to pixel-perfect UI deliverySurface emotional-state outputs (energy, mood, focus scores) from the backend inference model in a clear, compelling, and polished consumer experienceCollaborate closely with the founding team - including hardware, neuroscience, and design - to shape the full product experienceBuild and maintain full-stack integrations between the iOS app and backend servicesSet engineering standards and best practices as the mobile org grows around you
What We're Looking For
RequiredSeveral years of professional experience shipping consumer-grade iOS apps (no fresh graduates)Strong proficiency in Swift and the iOS ecosystemFull-stack capability - comfortable working across mobile and backend layersTrack record of owning and delivering polished, production-quality mobile productsSelf-directed and comfortable working in a fast-moving, early-stage environmentNice to HaveExperience with health, fitness, or wearable consumer appsFamiliarity with biometric data, Bluetooth/BLE hardware integration, or real-time data streamingPrior founding or very early-stage startup experienceCompensation &
Benefits
Salary: ~$150,000 USD (or ~£75,000 GBP for London-based candidates)Equity: Up to 1 - 2% - meaningful founding-level ownershipEarly-stage company with Series A/B angel and strategic-partner funding round in progressVisa sponsorship: Not available for new sponsorships; visa transfers are welcomeLocationPrimary office in London, United Kingdom. The team is also present in San Francisco. Flexible arrangements considered for the right candidate - on-site or remote.Find more English Speaking Jobs in Germany on Arbeitnow
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