Applied Research 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

Build and scale automated evaluation pipelines (LLM-as-judge + human review) with clinical-grade benchmarks.

What you Must Bring

• Proven experience designing agentic processes and LLM evaluation/benchmarking frameworks.
• Strong Python and ML background (PyTorch/TensorFlow, Hugging Face, LangChain/LlamaIndex).
• Demonstrated ability to design rigorous experiments and translate findings into production.
• Track record of published research or deep applied work in LLMs and agent evaluation.
• Strong communication and technical writing skills to articulate complex findings clearly.

First-Month Focus

• Audit existing evaluation approaches for clinical and agentic tasks.
• Define initial benchmarks and build early automated pipelines.
• Partner with engineering to land first set of CI gates for accuracy, factuality, and safety.

90 Days

• Deliver a repeatable evaluation framework with automated pipelines in production.
• Demonstrate measurable improvements in robustness, hallucination reduction, or safety.
• Publish or present internal research findings that directly shape product reliability.

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 Join Sully.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