Toronto, ON Full time CA$127,000 - CA$203,000 / year

Lead Data Scientist (Graph Analytics)

Mastercard is seeking a Lead Data Scientist for its Cyber Analytics team within Security Solutions Data Science. The role develops analytics and machine-learning solutions for cybersecurity, payments, and fraud, and includes people-management responsibilities for junior team members.

Responsibilities
Design, develop, validate, and implement analytical solutions, predictive models, and machine-learning algorithms using large-scale payments, fraud, merchant, cybersecurity, and threat-intelligence data.
Lead graph analytics and modeling, including graph schema design, relationship modeling, community detection, link analysis, graph embeddings, and graph neural networks.
Identify hidden communities, anomalous relationships, compromise paths, and risk patterns across connected entities.
Use Python, SQL, Spark, Hadoop, and Databricks to build scalable data pipelines, analytical datasets, model features, and production-ready solutions.
Define model performance metrics, validation strategies, monitoring requirements, and business-outcome measures.
Partner with product, engineering, cybersecurity, operations,



and data science teams to deploy analytical capabilities; communicate findings and tradeoffs to technical and non-technical stakeholders.
Coach and provide technical guidance, career-development support and feedback to junior team members.

Qualifications
Bachelor's or Master's degree in a quantitative or related field.
Experience leading data science projects from problem definition and research through validation, implementation, and production handoff.
Substantial hands-on graph analytics experience, including graph data modeling, node and edge feature engineering, and scalable graph-based machine learning.
Advanced Python and SQL skills and substantial experience with Apache Spark, Hadoop, Databricks, and distributed datasets.
Robust knowledge of statistical modeling, machine learning, anomaly detection, feature engineering, model evaluation, and performance monitoring.
Cybersecurity, web application security, threat-vector, or payment-card fraud knowledge is helpful.

Compensation

Toronto pay range: $127,000-$203,000 CAD. The successful candidate may also be eligible for a discretionary annual incentive program.
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📌 Lead Data Scientist Graph Analytics Toronto
🏢 Skillhub Solutions
📍 Toronto