Founding Full-Stack iOS Engineer

Role description

About the Role

This is a founding engineering role at a Y Combinator–backed wearable AI startup building a consumer device that reads and interprets emotional states in real time. You'll own the companion iOS app end-to-end — the primary touchpoint between sophisticated AI inference technology and the people who use it. As an early team member, you'll have real ownership and a direct hand in shaping the product as the company scales.
What You'll Do

Own the companion iOS app from architecture through deployment and ongoing iteration.

Translate emotional-state outputs from an AI inference model into intuitive, meaningful app interfaces.

Build and ship a polished, consumer-grade mobile experience that meets high product and UX standards.

What We're Looking For

3+ years of professional iOS development experience with

Swift

, and 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 backend API integration — authentication, data sync, and data modelling.

Experience surfacing machine learning or AI model outputs within a mobile app UX.

Ability to deliver polished, performant UI/UX with a strong eye for consumer-grade design.

Strong CS fundamentals and comfort making autonomous technical decisions as a founding engineer.

Able to work across time zones; comfort collaborating with a distributed team.

Work authorization in the UK or US required — visa transfers may be considered, but new sponsorship is not available.

Compensation & Benefits

Salary of

$150,000 USD

(or approximately

£75,000 GBP

for the London office). Meaningful

equity stake

offered as a founding team member. No new visa sponsorship; visa transfers may be considered.
Location

On-site in

London, England, UK

(London office). Candidates based in San Francisco or fully remote may also be considered depending on fit.