Founding Principal Full Stack Engineer

  • fulltime
  • New York
  • USD 200000.0 to 320000.0 Annum

The Company

We’re partnering with an early-stage, venture-backed AI company building the operating system and software infrastructure for psychotherapy practices, an industry that has seen very little automation to date. The engineering team is intentionally small—joining as the 3rd or 4th engineer—and this hire will work directly with the co-founders to shape both the product and engineering culture from the ground up.

The Role

This is much more than joining an established team. You’ll have significant ownership over the architecture, execution, and production operations of major product verticals end-to-end (including practice analytics, AI-powered insights, and EHR integrations).

You’ll be responsible for:

  • Owning entire product verticals end-to-end: roadmap, architecture, execution, and production operations

  • Building AI-powered analytics and tooling that empowers operators with actionable summaries and recommendations

  • Architecting and deploying full-stack features (Python/React) on AWS infrastructure with no dedicated DevOps support

  • Managing parallel Claude Code/Codex agent sessions to ship at dramatically higher velocity

  • Making key product and architecture decisions autonomously—identifying opportunities, forming opinions, and shipping without waiting for specs

  • Working directly with the CTO and co-founders on both immediate product needs and long-term technical strategy

What We’re Looking For

  • 5-10+ years of full-stack engineering experience

  • A proven track record of zero-to-one ownership—building and shipping products end-to-end rather than just feature work within a larger team

  • Full-stack fluency across frontend and backend (Python, FastAPI, TypeScript, React, PostgreSQL, AWS)

  • Experience with sophisticated agentic AI workflows, deeply integrating Claude Code/Codex with parallel sessions and custom tooling

  • High agency and ownership mindset with comfort operating in an intense, early-stage environment

  • Strong technical background in system design, distributed infrastructure, and browser automation/EHR integrations is desirable

What’s in It for You?

  • Work directly with the CTO and co-founders as one of the most senior technical hires in the business

  • Shape major product verticals and engineering standards from the ground up rather than inherit established systems

  • Significant influence over product direction, technical architecture, and company culture

  • Join a very small engineering team where individual impact is highly visible

  • $200,000–$320,000 base salary

  • Meaningful early-stage equity

  • Full healthcare benefits

This is a full-time, five-day on-site role in New York City.

  • RDS
  • PostgreSQL
  • ElastiCache
  • Playwright
  • React
  • Codex
  • TypeScript
  • GitHub Actions
  • ECS
  • Docker
  • EC2
  • Claude Code
  • FastAPI
  • AWS
  • Python
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