Five rounds over three weeks: (1) 30-min recruiter screen; (2) 60-min technical interview on feature engineering and model-selection trade-offs; (3) take-home case—clean messy voter-roll data and build a persuasion-score model; (4) “war-room” simulation where you defended your approach to a mixed panel of strategists, data scientists, and an ethics advisor; (5) culture-fit chat with the CEO. Offer and comp details arrived within 48 hours. NDA and background-check paperwork were sent separately.