Principal Applied Scientist

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Full job description

Microsoft Ads Fraud Detection team seeks a Principal Applied Scientist to lead complex fraud detection challenges by designing anomaly detection approaches, building cross-signal correlation frameworks, and developing scalable ML models and low-latency pipelines. The role requires architecting end-to-end scalable solutions ensuring performance, resilience, and cost-efficiency. Responsibilities include leading fraud detection initiatives, developing production-scale ML solutions, translating scientific insights into production impact, applying advanced ML methods including anomaly detection and LLMs, collaborating across teams, and mentoring scientists. Required qualifications include a relevant degree with 3-6+ years experience, ability to pass Microsoft Cloud background check, and strong expertise in ML, fraud detection, and system design. Preferred qualifications include advanced degrees with extensive research and production ML experience, publications, and leadership skills. The position is full-time, on-site in Redmond, WA or Mountain View, CA. Salary ranges from $142,800 to $304,200 depending on location.