Principal Applied Scientist (User Modeling)

This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Principal Applied Scientist (User Modeling) based in the United States. As a Principal Applied Scientist (User Modeling), you will shape the next generation of AI-powered experiences by developing models that help intelligent agents understand user behavior, preferences, and long-term goals. You will lead the design of sophisticated user models that capture evolving needs and predict how decisions influence future outcomes. Working at the intersection of machine learning, causal inference, sequence modeling, and reinforcement learning, you will turn cutting-edge research into scalable, production-ready solutions. Your work will support personalized experiences across complex consumer journeys, from initial discovery to high-stakes decisions. You will own challenging scientific initiatives end to end while collaborating with product, engineering, data, and research teams. This is an opportunity to influence technical strategy, mentor scientific talent, and build foundational AI capabilities that deliver meaningful impact at significant scale.