Overview
Microsoft Advertising is building the next generation of AI systems for understanding advertiser behavior, detecting anomalies and emerging threats.
We are looking for a Principal Applied Scientist with a robust foundation in mathematics, statistics, and core machine learning to advance:
• Foundation models for behavioral, content, entity, and risk understanding.
• Anomaly detection and threat modeling for new and evolving abuse patterns.
• Decision uncertainty modeling across models, agents, workflows, and human review.
• Tool-using agents that investigate cases, gather evidence, and support automated and human decisions.
• Rigorous evaluation of models, agents, and end-to-end decision systems.

You will work with large-scale behavioral, multimodal, temporal, and relational data to build capabilities that generalize across products, markets, policies, and changing adversarial environments.
This is a hands-on scientific role with end-to-end ownership from problem formulation and model development through large-scale training, evaluation, productionization,



and measurable product impact.

Responsibilities
Responsibilities
• Define and lead scientific initiatives in one or more areas eg foundation models, behavioral modeling, anomaly detection, threat modeling, agentic systems.
• Develop scalable learning systems that understand entities, content, relationships, and behavior over time while identifying known, emerging, and previously unseen risks.
• Develop methods to model and propagate uncertainty across individual models, model cascades, agent trajectories, retrieved evidence, automated decisions, and human judgments.
• Use uncertainty, confidence, severity, and business impact to determine when to automate, gather additional evidence, invoke a more capable system, abstain, or escalate to expert review.
• Translate threat models and adversarial insights into data strategies, learning objectives, model architectures, agent capabilities, and evaluation plans

📌 Principal Applied Scientist (Bengaluru)
🏢 Microsoft
📍 Bengaluru