Founding Engineer (Potential CTO)

ABOUT THE ROLE A fast-moving, seed-stage digital health company is looking for a Founding Engineer (potential CTO) to be the second technical voice on the team. This is a rare 0→1 opportunity to shape the full engineering direction of an AI-native mobile health platform that uses biosignal data and real-time coaching to help people manage chronic symptoms by improving autonomic nervous system health. You'll own the architecture, ship the first end-to-end AI product experience, define the engineering culture, and grow into a CTO role as the company scales. This is a deeply hands-on, in-person role based in New York City, San Francisco, or Montreal. WHAT YOU'LL DO - Serve as the founding engineer and de facto technical leader, owning both direction and execution. - Ship the v1 AI coaching experience end-to-end — from a React Native mobile app to frontier-model-backed inference and wearable integrations. - Architect and build the nervous system training AI coach, including model design, p