Senior Data Scientist
Core
Drive the evolution of Proofpoint's email threat detection engine by applying state-of-the-art machine learning to identify and solve sophisticated email-based threats for global enterprises.
Role type
Senior IC machine learning engineer (email security)
Builds
Production ML models for email threat detection and LLMs for domain-specific tasks
Domain
Cybersecurity / Email security / Machine Learning
Deliverable
production ML models
Required skills
Neural network architectures, Deep learning frameworks (PyTorch, TensorFlow, JAX), Gradient boosting (XGBoost, CatBoost, LightGBM), LLMs and agentic workflows, Distributed computing (Spark, Iceberg, Athena), AWS SageMaker, Model monitoring and drift mitigation
Preferred skills
Graph neural networks, Advanced fraud detection techniques, PyTorch Geometric or DGL
Technologies
PyTorch, TensorFlow, JAX, Spark, Iceberg, Athena, AWS SageMaker, XGBoost, CatBoost, LightGBM
Responsibilities
Engineer scalable feature pipelines from massive unstructured email datasets, Fine-tune LLMs for email topic detection and NER, Train neural network models to identify anomalous patterns, Deploy models to production using AWS SageMaker, Partner with Product and Engineering to drive data-driven decisions, Mentor junior data scientists, Evaluate and integrate emerging ML/AI advancements
Seniority
Senior, hands-on IC
