Research Scientist, Medical World Models

The posting, as Function Health wrote it

Our mission
Function Health’s mission is to empower people to live longer, healthier lives through proactive, data-driven healthcare. We aggregate and analyze comprehensive health data — including blood tests, imaging, and longitudinal biomarkers — to provide members and clinicians with actionable, clinically meaningful insights.

We believe individuals should understand their own health deeply, in context, and over time. Our platform brings together complex medical data and transforms it into clear, trustworthy insights that support better health decisions.

Your mission
Function Health is building something that has not existed before: a multimodal, longitudinal picture of health for hundreds of thousands (soon to be millions) of people. The Function proactive health dataset includes whole-body MRI, 100+ blood biomarkers, radiology reports, questionnaires and, increasingly, wearables data, all linked to the same individual and refreshed over time. The Medical Intelligence Lab (MIL) at Function exists to turn that data into an early-warning system for every member. In a nutshell, we aim to design a new model of proactive, predictive and preventative health.

The World Model team’s job is at the core of that ambition. We are building models that can do two things: represent a member’s health today from whatever data exists historically, and predict how that state evolves, what the next lab panel is likely to show, what the next scan is likely to find, and eventually how that trajectory changes under an intervention.

As a Research Scientist on this team you will be a key technical contributor, working directly with the Team Lead and MIL’s Chief Medical Scientist. You will design and train the models, own the evidence that they work, and ship them as the pretrained foundation upon which a portfolio of MIL products and tools build. The work is expected to reach large numbers of members and also the scientific literature; we publish, and we deliver.

What you’ll do

Research and Design

• Longitudinal health dynamics. Design and train models that forecast a member’s next health state from irregularly sampled histories (repeat biomarker panels, questionnaires, and imaging-derived features, etc) with calibrated uncertainty at clinically meaningful horizons.
• Multimodal health-state representation. Develop encoders capable of unifying medical data into a fused representation that is robust to arbitrary missing modalities, and that transfers efficiently to downstream clinical tasks.
• Evaluation as a first-class deliverable. Build and maintain the evaluation framework that decides what we ship: powered validation sets, confidence intervals, label-efficiency curves, forecasting metrics, collapse diagnostics, and benchmark registration against MIL’s clinically validated specialist models.

Development and Delivery

• Own the training and evaluation codebase end to end: data loaders over our standardized research exports, distributed training on GP

[…]
, ADNI) or with EHR/lab time series.

• Tabular foundation models or numeric tokenization for continuous clinical values; normative modelling; biological/organ-age estimation.
• Vision–language pretraining with radiology reports; report information extraction with LLMs.
• Cloud ML infrastructure (AWS, Databricks); experience in healthcare or other regulated, PHI-sensitive environments.
• Prior experience as a founding or early member of a research team.

What’s in it for you?
You will help define the technical foundation of a new paradigm in healthcare. Your work will directly shape how millions of people understand and improve their health over decades and you will do it with data that no academic lab has, working closely with other scientists, engineers, and clinicians.

You’ll also have access to

• Stock options
• Comprehensive health, dental, and vision plans for you and your family
• Wellness and commuter benefits
• Competitive vacation policy
• A culture that emphasizes learning, collaboration, and thoughtful engineering
• Remote work flexibility

Our commitment to diversity and inclusion
We’re aiming to build a diverse team and inclusive company culture. We are an equal opportunity employer and do not discriminate based on race, ethnicity, nationality, religion, sex, gender, gender identity, gender expression, sexual orientation, age, disability, veteran status, genetic information, marital status, or any legally protected status.

Important Notice: Legitimate communication from the Function Health team will always come from an email address ending in @functionhealth.com . Function Health will never request personal information such as banking details or payment during the hiring process. Please be cautious of communications or job offers that come from other email domains, instant messaging platforms, or unsolicited calls. If you ever have doubts about the legitimacy of a communication, please reach out to us directly at talent@functionhealth.com .