Senior Data Scientist

About the Role

Hello Heart is seeking a Senior Data Scientist to join the team that builds the predictive intelligence powering the Hello Heart app. You will own the ML models behind user engagement, cardiovascular risk stratification, and personalized health recommendations the systems that determine what users see, when they're nudged, and how their health trajectories are shaped.

This role demands both statistical depth and engineering proficiency you will be expected to take models from research through to deployment, write code built for production, and use AI coding assistants fluently as part of how you get work done.

Responsibilities

• Lead end-to-end development of predictive ML models. From data exploration and feature engineering through training, validation, deployment, and ongoing monitoring across engagement and clinical risk domains.
• Apply strong statistical foundations to model design, feature selection, uncertainty quantification, and interpretation of results
• Write production-grade Python code that is clean, tested, and built for maintainability and scale.
• Use AI coding assistants to accelerate development, code review, and documentation without sacrificing quality or rigor.
• Partner with product managers, data engineers, and software engineers to translate strategic questions and user behavior patterns into measurable, target="_blank">Instagram page.