Proficient in Python (pandas, numpy, statsmodels) or R Experience with massive datasets (TB scale) Strong SQL skills Statistical foundations: experimental design, hypothesis testing, regression analysis, time series basics Experience with A/B testing or incrementality testing (minimum 10+ tests executed) Familiarity with causal inference methods (synthetic controls, matched markets, difference-in-differences, causal impact) Experience with BI platforms (Looker, Tableau, Mode, or similar) Version control using Git/GitHub 4+ years analyzing digital marketing performance (SEO, paid search, e-commerce, or similar channels) Hands-on experience executing tests at volume Understanding of e-commerce metrics, conversion funnels, and attribution Client-facing or embedded team experience