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Senior Data Scientist at Hungryroot. Location Information: United States. Hungryroot is the online grocery service that makes healthy eating easy and personal.. Separate durable preference from noise by designing robust feature representations.. Model temporal dynamics and changing tastes with sequential and recency-aware systems.. Solve the cold-start problem using cohort signals, clustering, and content embeddings.. Bridge ML and constrained optimization by integrating model scores with operations-research engines.. Advance the modeling with modern, high-scale personalization architectures.. Drive rigorous experimentation through robust offline evaluation metrics and online A/B tests.. 5+ years of hands-on experience in data science, applied machine learning, or a related quantitative role.. Experience with ML system best practices, including moving systematically from problem definition to CI/CD for ML.. Deep expertise in personalization, search ranking, or recommender systems, with multi-stage architectures experience.. Strong grounding in statistics, causal inference, and experimentation.. Production-level engineering skills in Python and SQL with experience scaling models using big data frameworks.. Commercial mindset to translate business constraints into scalable ML architectures.. Clear communication and a collaborative, remote-friendly working style, including mentoring others.. Pay range:. $168K - $210K. Remote-first work arrangement. Equity. Unlimited vacation policy. Universal paid parental leave. Monthly Hungryroot credit for groceries. Comprehensive health, vision, dental, and life insurance. 401k with Company Match. Work from home stipend