Trust and Safety - Senior Data Scientist

Job description

About the Role Scale is at the frontier of Generative AI and human-AI collaboration. The Gen AI Ops Trust and Safety team protects contributor integrity across a marketplace of hundreds of thousands of contributors training foundation models. We're looking for a modeling-focused Data Science Lead who ships fast, thinks in systems, and uses AI coding tools as a core part of their workflow. This is a high-autonomy IC role. You will own fraud and abuse detection models end-to-end — from label definition through feature engineering, training, evaluation, and production deployment. You'll work in a small team that operates at 10x velocity by pairing deep analytical judgment with AI-augmented development (Cursor, Claude Code). If you've felt limited by teams that move slowly or separate "analysis" from "building," this role eliminates that gap entirely. You Will: - Own the model lifecycle — from label definition through feature engineering, training, evaluation, and production deployment. Ground truth is ambiguous and non-binary; you'll need to make it work anyway. - Build and extend the feature store — design and productize signals across identity, behavioral, and third-party data sourc...