Lotus AI gives you infinite personalized care powered by your health data, AI trained on leading medical evidence, and real doctors you can trust. Backed by Kleiner Perkins and CRV.
About the role
We are hiring a Founding Research Engineer to design, prototype, and ship the core reasoning and agentic systems that power Lotus. You will turn messy health data into accurate, cited, and actionable guidance for patients and clinicians. The work blends applied research with product engineering: dataset curation, model training and evaluation, retrieval and tool use, safety and alignment, and putting breakthroughs into production.
What they're looking for
- Strong Python and deep experience with PyTorch or JAX
- Track record shipping applied ML or LLM features to real users, not just prototypes
- Hands-on experience with RAG, prompt and tool design, evaluation harnesses, and error analysis
- Solid SQL plus comfort with vector stores and retrieval patterns
- Product sense, pragmatism, and the ability to reduce complex systems into simple, reliable components
- Willingness to work on-site in San Francisco
More about this role
Lotus Health is a groundbreaking primary care app that integrates your medical records, AI, and real doctors to provide free, personalized healthcare and prescriptions.
Our team includes ex-founders and engineers who have built and scaled consumer apps to millions of users, generating over $100M in annual revenue. Lotus is backed by Kleiner Perkins, and clinicians at Harvard and Stanford.
We are hiring a Founding Research Engineer to design, prototype, and ship the core reasoning and agentic systems that power Lotus. You will turn messy health data into accurate, cited, and actionable guidance for patients and clinicians. The work blends applied research with product engineering: dataset curation, model training and evaluation, retrieval and tool use, safety and alignment, and putting breakthroughs into production. You will work side by side with clinicians and the founding team and your work will reach patients quickly.
Research and Modeling
Build and iterate on agentic workflows that use retrieval, function calling, and planning to answer health questions with citations and uncertainty awareness
Fine tune and distill models for summarization, extraction, classification, and...
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