Founding Engineer (Potential CTO)

Accountabilities:

• • Own technical direction, architecture, and execution as the founding engineer, with the potential to grow into the CTO role.
  • Build and launch the first end-to-end AI coaching experience, spanning the React Native mobile application through AI model inference.
  • Architect and develop an AI-powered nervous system training coach, including model integration, prompt engineering, tool use, and evaluation frameworks.
  • Translate real-time biosignals such as HRV, breathing, motion, and PPG into personalized coaching experiences for users.
  • Develop AI-powered quality assurance and testing pipelines that enable safe, reliable, and high-frequency product releases.
  • Make full-stack technical decisions across mobile frontend, backend services, infrastructure, databases, AI-native systems, and integrations.
  • Build and maintain integrations with iOS HealthKit and wearable platforms such as Apple Watch, Oura, Whoop, and EEG headbands.
  • Own the complete mobile product lifecycle, including development, release management, debugging, monitoring, iteration, and ongoing optimization.
  • Work closely with the founding team to translate product vision into scalable technical solutions and prioritize high-impact initiatives.
  • Establish engineering practices, technical standards, and development processes that can support the growth of the future engineering organization.
  • Make pragmatic architectural and product trade-offs in a fast-moving environment while maintaining quality, reliability, and user safety.

  Requirements:

  • 3+ years of experience in mobile and full-stack software engineering, with a demonstrated ability to take consumer mobile products from 0→1 and ship them to real users.
  • Deep proficiency with React Native and experience owning the complete mobile development lifecycle.
  • Production experience with Claude or other frontier AI models, including prompt engineering, tool use, model integration, and evaluation.
  • Strong understanding of AI-native application architecture, with experience integrating AI throughout the product and technology stack rather than treating it as an isolated feature.
  • Backend development experience using Node.js or Python, ideally with PostgreSQL and modern cloud infrastructure such as Vercel, Fly, or Render.
  • Hands-on experience with Apple HealthKit, wearable APIs, or real-time biosignal data, including HRV, PPG, motion, or related physiological signals.
  • Strong architectural and systems-design capabilities, with the ability to make independent technical decisions in an early-stage environment.
  • Founder mindset, entrepreneurial approach, and ideally previous experience as a first engineer or early-stage startup team member.
  • Ability to operate effectively with significant autonomy, ambiguity, changing priorities, and limited resources.
  • Strong communication and collaboration skills, with the ability to translate technical considerations into clear product and business decisions.
  • Willingness and ability to work in person in Montreal, San Francisco, or New York.
  • Background or strong interest in nervous system science, somatics, neuroscience, or trauma research is an advantage.
  • Visa sponsorship is not available for this position.

  Benefits:

  • $170,000 USD annual salary.
  • Meaningful equity participation.
  • Opportunity to join an early-stage healthtech venture at a foundational stage.
  • Potential path to Chief Technology Officer (CTO) as the company and engineering organization grow.
  • Significant ownership over technical architecture, product development, AI strategy, and engineering culture.
  • Opportunity to work directly with frontier AI technologies, mobile platforms, wearable data, and real-time biosignal processing.
  • High level of autonomy and influence over the company's technical direction.
  • Opportunity to build foundational systems and products from the ground up.
  • In-person collaboration in Montreal, San Francisco, or New York.
  • Visa sponsorship is not available.