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Full Stack Engineer

CoTherapy.aiToronto, Ontario, CanadaPosted 3w ago
AI Engineer
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Job Description

About the Company

We’re building a next-generation AI system in the mental health space that bridges the gap between clinical care and scalable digital support. The company is founded by a practicing psychiatrist with 20+ years of clinical experience and multiple successful exits in healthcare technology. We’re operating at the intersection of AI safety, personalization, and human-centered design.


About the Role

You’ll work directly with our CTO (architecture) and CEO/clinical founder (product), alongside a Principal AI Engineer who owns the intelligence layer. You own everything else: the full application stack, the infrastructure it runs on, and the API surface that connects the product to our AI system. We move fast with AI-assisted development and have meaningful code already in place — you’re picking up a real codebase and pushing it forward, not starting from zero.


Responsibilities

  • End-to-end application build from architecture through private pilot
  • Frontend and backend for a clinician-facing and client-facing web application
  • API layer that connects to the AI orchestration system
  • Database design, schema management, and migrations (PostgreSQL/Supabase)
  • Auth, security, RLS implementation, and compliance infrastructure
  • Deployment pipelines, CI/CD, and cloud infrastructure (Vercel and beyond)
  • Collaboration with the founder on product design and iteration


Qualifications

  • 4+ years of professional experience. You’ve built a production web application from scratch (0→1).
  • Strong React + PostgreSQL — can ship fast and own both frontend and backend.
  • Experience with healthcare data and regulated infrastructure is a hard requirement — you understand what PHI means in practice, not just in theory.
  • Agentic coding fluency is a hard requirement: you use Cursor, Claude Code, Codex, or equivalent as your primary development environment. Ideally you’ve shipped production code this way; strong demonstrated fluency will be considered.
  • Startup experience preferred: comfortable with ambiguity, owns problems end-to-end, ships over specs.


Stack

  • Stack: React 18 + Vite
  • PostgreSQL + Supabase
  • REST API design
  • Vercel
  • Git, CI/CD


Why Join

  • Competitive salary and meaningful equity, commensurate with experience.
  • Direct collaboration with a clinical founder deeply embedded in the field.
  • IP, roadmap, and pilot sites already in place — ready to build.
  • Small, senior team: your work has direct patient and clinician impact from day one.
  • A chance to define how safe, human-aligned AI shows up in mental health.