Principal Data Scientist

COMPANY DESCRIPTION Extuitive is a Flagship Pioneering–backed startup reimagining product innovation for the AI era. Our mission is to revolutionize go to market for planning and execution for the agentic age. Based in Cambridge, MA, we operate like a special ops unit—fast-moving, data-driven, and relentlessly focused on impact. THE ROLE As a Principal Data Scientist , you’ll be a technical leader responsible for the full lifecycle of the models and data science systems that predict and optimize advertising performance across channels. You’ll define the learning problems, training data, targets, and business outcomes to influence; train and rigorously validate the right models offline; and take the technology to market through customer-facing validation. You’ll work across paid social, search, display, video, and emerging channels, translating complex, noisy advertising data into robust models, explainable decisions, and measurable customer value as our platform and data scale. KEY RESPONSIBILITIES Define Learning Targets & Model Advertising Performance – Identify the customer decision and business intervention to influence; construct training labels and measurement windows; assess data quality, bias, and leakage; and develop predictive models that forecast campaign and creative performance across channels, audiences, placements, and objectives. Build Cross-Channel Measurement & Optimization Systems – Develop methods to compare and optimize advertising performance across paid social, search, display, video, and other channels while accounting for differences in measurement, attribution, and data availability. Develop Experimentation & Causal Measurement Approaches – Design and analyze experiments, incrementality tests, and causal inference approaches to verify that the targets we optimize change business outcomes, not just model metrics, and to distinguish correlation from true impact. Translate Models into Marketable Decisions – Turn model outputs into clear, custo