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Senior AI Engineer, Big Data & AI Solutions
Mastercard
O'Fallon, MissouriPosted Aug 27, 2026 · 10h ago$115k – $184k
Full-time$115k – $184kSeniorOn-siteFintech
About this role
Mastercard is seeking a Senior AI Engineer to join their Security Solutions Data Science team. This role focuses on developing and enhancing AI and machine learning capabilities to combat fraud and cyber threats within the global payments ecosystem. You will work with large datasets and machine learning models, collaborating with data scientists and engineers to improve feature engineering, model monitoring, and deliver AI-driven solutions.
What we are looking for
6- Develop AI/ML models for fraud and cyber threat detection
- Build and optimize data pipelines and feature engineering workflows
- Process and analyze large-scale datasets for model improvement
- Enhance model monitoring, observability, and drift detection
- Apply MLOps practices for reliability and scalability
- Collaborate with Data Scientists, Engineers, and Product teams
