Founding Full-Stack iOS Engineer

About the Role This is a founding iOS engineering role at an early-stage wearable technology startup backed by Y Combinator, building a consumer device that monitors and interprets emotional states in real time. You will own the companion iOS app end-to-end, translating sophisticated AI model outputs into intuitive, polished experiences for users. As one of the first technical hires, you will have real ownership over the primary consumer touchpoint and a direct hand in shaping how the product grows. What You'll Do Own the companion iOS app from architecture through deployment and ongoing iteration. Surface emotional-state outputs from the core inference model through clean, intuitive app interfaces. Build and ship a polished, consumer-grade mobile experience that meets high product standards. What We're Looking For At least 2 to 3 years of professional iOS engineering experience; this role is not suitable for fresh graduates. Strong Swift proficiency and a proven track record shipping polished, consumer-grade iOS applications. Experience building data-driven apps that present complex model or sensor outputs through clean, accessible interfaces. Strong computer science fundamentals and the ability to make and own technical decisions autonomously as a founding engineer. Comfortable working independently across time zones and collaborating on a lean, distributed team. Full-stack iOS capability, comfortable owning the app layer end-to-end. Compensation & Benefits Salary of $150,000 USD (or approximately GBP 75,000 for London-based candidates), plus meaningful early equity of up to 1 to 2% . No new visa sponsorship is available; visa transfers and OPT transitions are acceptable. Location On-site in London, England, UK . The team also has presence in San Francisco; candidates in other locations may be considered on a case-by-case basis.