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Legion Health (YC S21) operates a psychiatric practice and is building the AI-native operations layer for mental health care. We focus on the operational backend: scheduling, intake, documentation, billing, and care coordination. These workflows—not diagnostics—are the main bottlenecks in mental health delivery.

We run our own clinic, so the systems you build ship directly into real patient care. Our agent infrastructure currently supports more than 2,000 patients with one human support lead.

We’re hiring a Founding Engineer (in-person, San Francisco). You’d work directly with the founders on:

event-driven backend systems (Node.js, TypeScript, Postgres/Supabase, AWS)

LLM agent tooling (tool use, retries, memory, context management)

internal operations tools for both humans and agents

state/coordination logic that represents a patient’s journey

HIPAA-compliant data and audit pipelines

We’re open to backend or full-stack/product engineers who think in systems and have owned real workflows end-to-end. Prior experience with LLMs is optional; interest is required.

Details: full-time, in-person SF, salary $130k–$180k, equity 0.1–0.6%.

Apply here: https://www.ycombinator.com/companies/legion-health/jobs/oc6...

Hey HN! I'm Daniel, building Onlook, the Cursor for Designers. We built an open-source collaborative canvas for code that lets designers and developers craft incredible web experiences together.

Since launching, Onlook hit #1 on Hacker News, was the #1 trending repo on GitHub—above DeepSeek + Anthropic—and has earned over 23,000 GitHub stars. We’re looking to bring on Onlook’s first Founding Engineers.

This role requires autonomy - you’ll be setting standards for one of the fastest-growing open source projects backed by YC ever. You’ll help design and build an uncompromising visual IDE loved by tens of thousands of designers and engineers around the world, and you'll have a heavy influence on the direction of where we take the company.

You’re a full-stack engineer based in the U.S. who is ultra comfortable in Typescript, NextJS, React, and Tailwind, and ready to jump-in and build.

The most important things we look for:

• Olympic-level dedication – you want to be the best in the world at what you do.

• Ownership – you like autonomy and control over the destiny of the company.

• Speed – you’re comfortable shipping and iterating quickly with feedback.

• Craft – you’re opinionated and are willing to defend your opinions.

Ideally, you:

• Are looking for a fast-paced, early startup environment.

• Are willing to put in long hours and go the extra mile.

• Are comfortable with any part of the stack, front-end, back-end, or database.

• Believe in open source and are ok with your work being very public.

The comp range for this role is $130k-200k, 1-5% equity, great healthcare + other perks, and an awesome office if you happen to be in SF. We're open to remote / hybrid candidates.

If you’d like to stand out, please share a project or piece of work that you’re most proud of. We love seeing people’s work. If you have a personal website, please include that as well.

If you're interested, email daniel@onlook.com with your Github / LinkedIn / Website or work samples and why you'd be a great addition to the team, or apply here: https://www.ycombinator.com/companies/onlook/jobs/e4gHv1n-fo...

Excited to meet, and build alongside you!