Senior Machine Learning Email Security Engineer

Build email security with transformer training and production engineering as a Senior Machine Learning Engineer working remotely from Canada. Protect infrastructure against evolving threats.

This senior role develops and deploys machine learning technology against spam, phishing, and other cyber threats. You will train models with PyTorch, build efficient CPU inference, and improve a production solution filtering email across approximately 5,000 hosting servers. The work spans datasets, evaluation, releases, and quality improvements.

Key Responsibilities:

• Train, evaluate, and release spam detection models
• Develop Go inference services and mail filter integrations
• Investigate customer reported spam and phishing incidents
• Optimize detection rates against false positive risks
• Maintain training infrastructure and corpus management tools

Requirements:

• At least five years delivering detection or classification systems
• Production classifier ownership from corpus construction through release
• Transformer training experience with PyTorch and ONNX export
• Strong Linux, shell scripting, and Python knowledge
• B2 level or higher English with strong written communication

Apply machine learning, systems engineering, and evidence based judgment to strengthen reliable email threat detection.