Senior Software Engineer

About Us At Sully.ai, We’re Building the Most Impactful Healthcare Company on Earth We believe that access to a great doctor is a basic human right. Today, that’s not a reality. Delays, misdiagnoses, administrative chaos, and burnout plague the system. Our Mission: One Human, One Doctor. We build AI teammates that augment clinicians — scribes, nurses, receptionists, translators — all powered by our own world-class models and deployed in real-world care. Our Traction

• 450+ organizations signed 16 months
• AI agents cut admin by ~2.8 hours daily and reduce onboarding 85%.
• 5M+ Clinical Tasks completed to date, serving 36+ specialties.
• Raised $25M from YC, Eric Yuan, Amity, Semper Virens
• Patented AI architecture (MedCon-1) outperforms GPT-4.5, Gemini, Claude on clinical reasoning tasks

_Sully requires A-players capable of 4 months = 1 year output._What You'll Do Design, implement, and optimize core components across frontend, backend, and model integrations, while driving engineering direction in close collaboration with our co-founders. What You Must Bring

• Senior-level full-stack experience in React, TypeScript, and Node.js
• Proven ability to design, ship, and scale LLM-powered applications.
• Expertise in API design, streaming, and CI/CD pipelines.
• Strong cloud infrastructure background (AWS, GCP, or Azure).
• Track record of building reliable systems with measurable performance and error budgets.

First-Month Focus

• Audit current cross-agent flows for UI/UX cohesion.
• Implement shared components and typed contracts for reliability.
• Establish instrumentation for frontend performance and model round-trip tracing.

90 Day OKRs Deliver end-to-end tested, production-grade agentic workflows with <5% error rates.* Launch cross-agent design system and SDK used by at least 2 internal teams.

• Establish weekly “deploy and measure” cadence with performance metrics and error budgets. If you’ve ever said, “I want to do work that actually matters”, this is it. Let’s build something life-changing, together. Who Thrives Here

• Entrepreneurial to your core: You think in outcomes, thrive in chaos, and take ownership without limits
• Mission-obsessed: You’re here to save lives, not just ship features — patients and doctors are your why.
• Impact-driven & fast-moving: You sprint toward hard problems and ship with sharp judgment.
• Elite teammate: You raise the bar through high standards, direct feedback, and craft excellence.

Why JoinSully.ai? 🔥 Revolutionizing the antiquated $800B+ Healthcare market 🧠 50%+ of us are ex-founders. We hire A-players, not passengers ⚡️ Speed matters - we operate with urgency, autonomy, and ownership 🧪 You’ll work on real, first-of-their-kind problems at the edge of AI and medicine ❤️ Your work helps doctors reclaim their time - and patients get better, faster care