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.

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.