Principal Engineer

1 week ago

Toronto, Ontario, Canada Blair Health Full time

Principal Engineer (Path To CTO) — Blair Health

Blair Health is closing the specialist gap in women's healthcare by making expert menopause and midlife care instantly accessible using AI-driven clinical intelligence. We're hiring a Principal Engineer — a hands-on technical leader who can architect, build, and scale the platform while pushing the frontier of LLMs, ML, and clinical decision-support systems.

What You'll Do

  • Lead the technical vision and architecture across our full stack (React/TS, Tailwind, Node/Python, Supabase/Postgres)
  • Design and build scalable microservices and secure, compliant infrastructure (HIPAA/PHIPA)
  • Drive our AI/ML/LLM innovation roadmap, working with clinicians on real diagnostic and personalization workflows
  • Ship fast: build end-to-end features for patients, providers, and operations
  • Set engineering standards, DevOps practices, API strategy, and quality benchmarks
  • Optimize performance, reliability, and security as we scale across Canada & the U.S.
  • Partner directly with the CEO and clinical co-founder on product direction and technical strategy
  • Recruit, mentor, and grow the engineering team from 0 → 10
  • Operate like a founding technologist with material early-stage equity

Why Blair Health

  • A mission with deep impact:

Collapse 6–12 month specialist wait times to minutes; your work changes real lives
- Huge, underserved market:

Women's midlife health is a $50B+ category with no category leader
- Build at the AI frontier:

Work on LLM-powered assessments, triage models, safety layers, and clinical intelligence
- Real ownership:

Material equity + full control of architecture and technical direction
- Founder-led, no-ego culture:

Fast-moving team with strong product + clinical leadership
- True startup experience:

High velocity, high responsibility, zero bureaucracy

You Are:

  • A builder:  hands-on, scrappy, and excited to ship fast
  • A technical guru: strong across frontend, backend, infra, and systems design
  • A problem solve: unblock yourself, figure things out, and deliver
  • A product thinker: you care about user outcomes, not just code
  • An AI-minded engineer: curious and comfortable with ML/LLM systems
  • A leader: ready to influence architecture, process, and culture
  • A low-ego collaborator who moves fast, communicates well, and embraces iteration
  • Someone who thrives in ambiguity and loves building from zero-to-one

Experience We're Looking For

  • 5–6+ years full-stack engineering experience (startup or fast-paced environment ideal)
  • React/TypeScript + or Python expertise
  • Strong background in cloud (AWS/Vercel), APIs, and microservices
  • Experience with Postgres/Supabase or similar relational systems
  • Exposure to ML/LLM systems, embeddings, or applied AI (or strong desire to learn quickly)
  • Experience building production systems end-to-end with high reliability

If you want to build a category-defining platform and grow into CTO, I'd love to meet you.

What We Offer


• Base Salary +
Material early-stage equity
with real upside


• Direct mentorship + partnership with the CEO and clinical co-founder


• Immediate ownership of technical decisions, architecture, and innovation


• Opportunity to build out and lead the engineering team


• A chance to influence the future of women's healthcare at scale


• Fast-moving, flexible work environment (Toronto hybrid or remote Canada/US)


• The ability to shape a category-defining platform from day one


Email

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