Job Description
### 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 in 16 months
- AI agents cut admin by ~2.8 hours daily and reduce onboarding by 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
### About the Role
We are seeking a **Staff Software Engineer** to architect and scale Sully.ai’s platform-level agentic AI systems within our Engineering Research team. This role combines full-stack engineering excellence with deep expertise in LLM-powered experiences. You’ll design, implement, and optimize core components across frontend, backend, and model integrations, while driving engineering direction in close collaboration with our co-founders. Your work will directly shape the reliability, speed, and cohesion of Sully.ai’s multi-agent ecosystem.
### What You'll Do:
- Architect and implement cross-agent systems that power core Sully.ai experiences.
- Build and scale full-stack product components using TypeScript/React and Python services.
- Integrate LLMs into production workflows with strong contracts, observability, and test coverage.
- Develop shared UI components and typed SDKs to unify cross-agent experiences.
- Lead engineering direction, collaborating with founders and cross-functional stakeholders.
### What You Must Bring:
- Staff/Principal-level full-stack experience in React, TypeScript, and Node.
- 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.
### Nice-to-Have:
- Experience with WebRTC or audio-aware UI design.
- Hands-on work with agentic AI frameworks.
- History of creating design tokens, SDKs, or cross-agent platforms.
### 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.
### Success OKRs (90 Days):
- 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.