Senior Software Engineer, Frontend
Company: Lassie
Location: San Francisco
Posted on: April 2, 2026
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Job Description:
Lassie is building the AI for every health practice. One million
health practices spend $100B a year on admin staff, and still can't
find enough people. Since COVID, offices are chronically
short-staffed. Patients feel it every day in unanswered calls and
confusing bills. We believe the doctor's office of the future is
run by AI. An agent that runs the business, handles the
administration, and becomes the interface patients use to interact
with their doctor's office. Founded by Steijn Pelle (helped
Robinhood and Coinbase grow to their first hundreds of millions in
annual revenue) and Frédéric Renken (engineer turned first product
hire at Superhuman), we're bringing consumer product DNA to
healthcare and reimagining how a million doctors and 300 million
patients interact with the doctor's office. About the role We're
hiring a design-minded engineer to build the control plane for
powerful agents handling billing and medical records. Real patients
and real practices depend on these systems. You'll craft interfaces
that make autonomous agents feel trustworthy and effortless to
supervise. We take a consumer approach to healthcare software:
approachable, elegant, and sweating the details. The product spans
onboarding, human-in-the-loop review, the tools practice owners use
to understand their business, and more. You will be a great fit if
you… Strive for great, not good, and iterate until you get there
Take pride in building software that feels fast and effortless Look
for leverage: using tools, automation, and process to multiply your
impact Have strong fundamentals in JavaScript and browser APIs
Believe healthcare software should be as delightful as consumer
products Some things we've built A sync engine backed by encrypted
SQLite in the browser, enabling 100ms experiences for healthcare
payments and patient ledgers Systems that eliminate thousands of
hours of paperwork every month Data pipelines processing $1B in
insurance claims Technology we use We invest heavily in
productivity. Engineers should have the best tools for the job and
the freedom to choose them. TypeScript, React, Tailwind Python
(Django, Pydantic AI), Postgres, Redis Google Cloud Platform,
Vercel Linear, Slack, Notion Joining us To start, you'll have a
handful of conversations with our founders and team. If there is
mutual excitement, we'll invite you for an in-office work trial
where you'll collaborate on real problems we're solving and meet
the team.
Keywords: Lassie, Danville , Senior Software Engineer, Frontend, IT / Software / Systems , San Francisco, California
