About the Role
This is a founding engineering role at an early-stage healthtech startup building an AI-powered nervous system rehabilitation platform. You'll be the second technical voice on the team — owning the full stack from a React Native mobile app to frontier AI model integration and real-time biosignal processing — and you'll help shape both the product and engineering culture from the ground up.
What You'll Do
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Own technical direction and execution as the founding engineer, with a path to CTO.
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Ship the first end-to-end AI coaching experience, from the React Native app through Claude-backed inference.
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Architect and build an AI nervous system training coach, including model design, prompt engineering, and evaluation frameworks.
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Translate biosignals (HRV, breath, motion, PPG) into a real-time coaching layer tailored to each user.
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Build AI-powered QA and testing pipelines to support safe, high-cadence shipping.
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Own full-stack decisions across frontend, backend, infrastructure, and AI-native layers.
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Integrate iOS/HealthKit and wearable platforms (e.g. Apple Watch, Oura, Whoop, EEG headbands).
What We're Looking For
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3+ years in mobile and full-stack engineering with a track record of shipping 0→1 consumer mobile apps to real users.
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Deep fluency in React Native and ownership of the full mobile lifecycle (build, release, debug, monitor, iterate).
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Production experience with Claude or other frontier models, including prompt engineering, tool use, and evals.
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Experience with AI-native infrastructure — AI integrated across the stack, not bolted on.
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Backend development in Node.js or Python with PostgreSQL and modern infra (e.g. Vercel, Fly, Render).
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Hands-on experience with HealthKit, wearable APIs, or real-time biosignal data (HRV, PPG, motion).
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Founder mindset with prior first-engineer or early-stage startup experience and comfort making hard tradeoffs.
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Ability and willingness to work in-person in Montreal, San Francisco, or New York.
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Background or strong interest in nervous system science, somatics, neuroscience, or trauma research is a plus.
Compensation & Benefits
Salary: $170,000 USD annually. Equity: Meaningful equity offered. Visa sponsorship: Not available.
Location
On-site. Primary location is Montreal, Canada, with the option to work from San Francisco, CA or New York, NY.
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