As a Senior Data Scientist, Ads Metrics at Google, you'll collaborate with engineers, product managers, researchers, and analysts to innovate and enhance experiment design, causal inference, and time-series analysis for critical product launches. Responsibilities include clarifying business questions, designing and evaluating mathematical models, gathering and validating data (using SQL, R, Python), and ensuring data quality. You will translate business needs into analytical solutions, utilizing custom or existing data infrastructure. The role demands expertise in statistical data analysis, regression analysis, and potentially causal inference, time-series analysis, and hierarchical models. This position requires strong communication and presentation skills.