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Senior AI Engineer

O'Fallon, Missouri💼 Full-time💰 $115,000–$115,000🗓 2026-08-14 → 2026-09-26

Core

Build and maintain AI/ML models and data pipelines to detect fraud, cyber-attacks, and suspicious activity in real-time for the global payments ecosystem.

Role type

Senior IC AI Engineer (Fraud Detection & MLOps)

Builds

Production fraud detection models, data pipelines, and monitoring systems for Mastercard's Safety Net product.

Domain

Financial Services / Cybersecurity / Payments

Deliverable

production ML models

Required skills

Python, PySpark, SQL, distributed data processing, feature engineering, large-scale data processing, Databricks, Airflow, Hadoop, Linux/Unix, cloud-native technologies, machine learning, deep learning, model deployment, MLOps, CI/CD

Preferred skills

Generative AI, LLMs, RAG, agentic AI applications, AI-assisted development tools, cloud-based data and AI environments

Responsibilities

Support machine learning models for cyber-attack and fraud detection; Create data pipelines and feature engineering workflows; Process and analyze large-scale datasets; Strengthen monitoring, observability, and drift detection; Apply automation and MLOps practices; Develop AI-powered solutions to streamline operational processes; Partner with Data Scientists, Engineers, and Product teams.

Seniority

Senior, hands-on IC

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