Adentris (Y Combinator) is hiring a Founding Engineer for its AI-powered compliance and revenue integrity platform serving behavioral health providers. The role offers $160K - $220K and 0.01% - 2.00% equity, based in San Francisco, CA or Austin, TX. You'll own the technical direction of the platform end-to-end, including clinical data modeling, AI pipelines, and infrastructure.

The company's systems read real patient records to identify clinical and regulatory risk, running entirely within a HIPAA-compliant Azure environment with no external LLM APIs touching patient data. You'll join three founders: Dmitry Karpov (CEO), Sergey Yudovskiy (CPO), and Alex Odin (CTO), all second- or third-time YC founders with deep enterprise and AI experience. The role demands 5+ years shipping production software with expertise in TypeScript/Node, Python, React, and Next.js.

First 90 days involve shipping to production, owning the EHR data layer, and making architecture decisions that define the company's future. This is ideal for someone who thrives on ambiguous problems and wants to build something meaningful in healthcare AI.