Nesso
Nesso is building an AI-native EHR (Electronic Health Record) for US mental health therapists in private practice.
Our mission is to help therapists run a better business so they can remain independent.
We combine practice management tools — scheduling, billing, documentation, client communication — with AI-driven business insights that help therapists grow as business owners.
Founded by the first employees of SimplePractice (the market leader used by 200,000+ therapists, IPO in 2021), our team spent 10+ years building software in this space. We are self-funded, pre-launch, and building V1 with a small senior team.
Our stack: React 19, TypeScript 5.5, Node.js 24, AWS (Lambda, Aurora Serverless, DynamoDB, Cognito), SST, Turborepo monorepo, Clean Architecture with DDD and CQRS.
What makes us different for engineers:
- Real technical ownership across the entire platform — no narrow lanes
- Hard problems: HIPAA-compliant architecture, AI therapists can trust, personalization at scale
- Small team, minimal meetings, maximum autonomy
- Fully remote, flexible hours, B2B contract
- Debate culture — decisions are challenged to find the best solution
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