# Lead Data Scientist at Mastercard

Mastercard is hiring a Lead Data Scientist in Toronto, Canada. Level rates it Little AI ●○○○; you can [apply on Level](https://jobsbylevel.com/go/cd2c4ca2-f95e-45cd-b68c-c302fe81c145?utm_medium=ai-agent).

AI Level 1, AI centrality 21 out of 100. Toronto, Canada.

## Details

- Company: [Mastercard](https://jobsbylevel.com/companies/mastercard)
- AI level: AI Level 1 (score 21 out of 100)
- Location: Toronto, Canada
- Posted: October 15, 2026
- Apply: https://jobsbylevel.com/go/cd2c4ca2-f95e-45cd-b68c-c302fe81c145?utm_medium=ai-agent

## Prepare for this job

The job page lists 2 likely interview questions for this offer, with a CV checklist: https://jobsbylevel.com/jobs/lead-data-scientist-at-mastercard-8d824f

## Description

Our Purpose Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, we’re helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary Lead Data Scientist Overview: Services within Mastercard is responsible for acquiring, engaging, and retaining customers by managing fraud and risk, enhancing cybersecurity, and improving the digital payments experience. We provide value-added services and leverage expertise, data-driven insights, and execution. Role: We are seeking a highly skilled and motivated Lead Data Scientist to join our Cyber Analytics team within the Security Solutions Data Science organization. The successful candidate will play a leadership role in developing advanced analytics and machine learning solutions across cybersecurity, payments, and fraud. This person will also have formal people-management responsibilities for junior team members, helping them grow their technical capabilities, manage priorities, and deliver high-quality work. Job Responsibilities: • Lead the design, development, validation, and implementation of advanced analytical solutions, predictive models, and machine learning algorithms using large-scale payment, fraud, merchant, cybersecurity, and threat-intelligence data. • Provide technical leadership for graph analytics and modeling, including graph schema design, relationship modeling, community detection, link analysis, graph embeddings, and graph neural networks – all in service of addressing real-world cybersecurity problems such as breaches, payment card testing, and scam rings. • Develop models and analytical methods that identify complex or indirect risk patterns across interconnected entities such as payment cards, merchants, domains, service providers, fraud events, digital skimmers, technologies, vulnerabilities, and threat-intelligence indicators • Apply graph algorithms and machine learning techniques to identify hidden communities, shared infrastructure, anomalous relationships, compromise paths, and patterns that cannot be sufficiently captured through transaction-level or entity-level models alone. • Work hands-on with Python, SQL, Spark, Hadoop, and Databricks to develop scalable data-processing pipelines, reusable analytical datasets, model features, and production-ready solutions. • Define appropriate performance metrics, validation strategies, monitoring requirements, and business-outcome measures for machine learning solutions. • Translate ambiguous business, product, cybersecurity, and fraud problems into clearly defined analytical approaches, technical requirements, and delivery plans. • Partner closely with product, data engineering, software engineering, cybersecurity, operations, and other data science teams to move analytical capabilities from research through production deployment. • Communicate analytical findings, model performance, technical tradeoffs, risks, and business implications clearly to technical and non-technical stakeholders, including senior leadership. • Provide regular coaching, technical guidance, career-development support, and actionable feedback to junior team members. All About You: • Bachelor’s or Master’s degree in Data Science, Computer Science, Cybersecurity, Information Technology, Engineering, Mathematics, Statistics, Physics, or a related quantitative field. • You are fundamentally a problem-solver who is comfortable entering complex and evolving problem spaces, identifying the most important questions, and developing practical analytical solutions. • You have proven experience leading data science projects from problem definition and exploratory research

The description is cut here. Read the full offer: https://jobsbylevel.com/jobs/lead-data-scientist-at-mastercard-8d824f

Source: https://jobsbylevel.com/jobs/lead-data-scientist-at-mastercard-8d824f

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