Applied Research Engineer (Contract to Hire) at Sully.ai
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.
This role is structured as a Contract-to-Hire position with a 60-day trial period. Sully.ai maintains an exceptionally high performance bar, and this structure ensures mutual alignment before transitioning to full-time.
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
Sully.ai is an equal opportunity employer. In addition to EEO being the law, it is a policy that is fully consistent with our principles. All qualified applicants will receive consideration for employment without regard to status as a protected veteran or a qualified individual with a disability, or other protected status such as race, religion, color, national origin, sex, sexual orientation, gender identity, genetic information, pregnancy or age. Sully.ai prohibits any form of workplace harassment.