nMark"] 26:T44b,

Kaystaff is Hiring a Founding Principal Engineer with 5‑10+ years of experience to join as the 3rd or 4th engineer at an early‑stage startup building the operating system for psychotherapy practices.

You'll work directly with the co-founders and own major product verticals end-to-end — from practice analytics and AI-powered insights to EHR integrations. This is a high-agency, high-ownership role for someone who wants to build a company, not just ship features.

Full-stack product development across major verticals, from concept to production
AI-powered insights and analytics features that are core to the product experience
EHR integrations connecting Kaystaff to the broader healthcare ecosystem
Cloud infrastructure and system architecture as the team and product scale
Engineering culture and practices as one of the company's founding technical hires

27:T426,

5-10+ years of experience, with a track record of building and shipping products 0 → 1
Experience at either a high-growth startup or a top-tier tech company
Full-stack fluency across frontend and backend — specific languages/frameworks matter less than range and adaptability
Experience with cloud infrastructure, AWS preferred
Has built product-facing analytics features
Has shipped production features with real AI integration (not just used AI-assisted tools to build)
Strong system design skills, high agency, and genuine ownership mentality
AI fluency — comfortable both building with AI and building AI into products

Compensation & Location

Base salary up to $320K, depending on experience
Equity: 0.5% – 1%
Based in New York City; relocation bonuses available for candidates willing to move
Visa sponsorship considered case-by-case