Senior Principal Machine Learning Engineer - Optimization

📋 Description Build ML models for campaign optimization, prediction, ranking, bidding, and calibration. Develop models to improve advertiser outcomes while balancing spend and goals. Work on large-scale ML systems using signals from auctions, impressions, clicks, conversions. Design CTR, CVR, VCR, CPA, ROAS models for campaigns. Develop bidding, pacing-aware optimization, ranking, and value-estimation approaches. Translate model outputs into real-time decisioning systems. 🎯 Requirements 10+ years building production ML, ranking, optimization systems Strong expertise in supervised learning, ranking, calibration, experimentation Experience with CTR/CVR prediction, conversion modeling, bid optimization Experience with large-scale data and distributed ML workflows Strong engineering skills in Python, Java, SQL, Spark, TensorFlow, PyTorch, XGBoost BS/MS/PhD in CS, ML, Statistics, Mathematics, Engineering, or related 🎁 Benefits Healthcare, dental, and vision insurance Disability and life insurance Commuter benefits and wellness programs Unlimited DTO in the US Mobile reimbursement and in-office catered lunches 5 days a week