Senior Data Scientist

Senior Data Scientist

Who is Mastercard?
Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.
Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.

• Configure, validate, and deploy machine learning models to customers around the world.


• Conduct Proof-of-Value exercises with customers to demonstrate model performance and business impact.


• Contribute to the research, development, and evaluation of new fraud, scam, and mule detection solutions.


• Support and improve production models as customer needs and fraud patterns evolve.


• Partner with Product, Customer Delivery, and Data Science colleagues to enhance our solutions and deliver greater customer value.


• Analyse complex datasets to identify opportunities for improved detection performance and customer outcomes.


• Contribute to a culture of learning, continuous improvement, and practical problem solving.

• Experience developing, evaluating, and deploying machine learning models in a commercial environment.


• Strong proficiency in Python for data science and machine learning.


• Experience working with structured and large-scale datasets.


• Ability to apply scientific thinking and sound analytical approaches to solve complex problems.


• Strong communication skills, with the ability to explain technical concepts and results to a variety of audiences.


• Curiosity and a willingness to challenge assumptions, learn new approaches, and continuously improve solutions.


• Ability to work independently while collaborating effectively across teams.


• A customer-focused mindset and an interest in understanding how data science creates real-world value.

• Experience with PySpark and distributed data processing.


• Experience building machine learning solutions for fraud, scams, mule detection, or broader financial crime use cases.


• Knowledge of the Account-to-Account (A2A) payments ecosystem.


• Familiarity with modern software development and model deployment practices.


• Experience working with payment, banking, or financial services data.

All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

• Abide by Mastercard’s security policies and practices;


• Ensure the confidentiality and integrity of the information being accessed;


• Report any suspected information security violation or breach, and


• Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.