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O Fallon, MO

Data Scientist Intern, Summer 2026 - St. Louis, MO

Internship
Financial Services
Data/Analytics
October 14, 2025

Mastercard

Worldwide payments technology and solutions provider
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This role is not eligible for Mastercard’s work authorization sponsorship. As such, candidates must be eligible to work in the United States, now as well as in the future, without employer sponsorship. For example, students or recent graduates in the United States on an F1 visa (including those with CPT or OPT authorization) are not eligible for this role.

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Overview

Mastercard works to connect and power a sustainable and inclusive global economy. We are a vehicle for commerce, a connection to financial systems for the previously excluded, a technology innovation lab, and the home of Priceless®. We ensure every employee has opportunity to be a part of something bigger and to change lives. We believe in connecting everyone to endless, priceless possibilities.

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About the Team

As a Data Engineering team, we are a dynamic and innovative team working at petabyte scale with cutting-edge big data platforms and technologies. Our mission is to streamline and automate the repetitive aspects of data science to accelerate innovation in AI/ML-driven fraud detection. We specialize in building high-quality, scalable ETL pipelines, developing robust feature engineering workflows, and creating shared tools that empower data scientists across the organization. Additionally, we play a key role in deploying model features and ensuring seamless integration into production environments.

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Internship Program

Mastercard’s summer internship program provides emerging talent with projects that will enhance skills as well as contribute to the department’s goals and objectives. In this program, you will participate in:

- Networking events, mentorship opportunities, and hear from senior leaders

- Volunteer and team building opportunities

- Formal performance assessments- End-of-summer presentations to peers and Mastercard leadership

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Qualifications

- Currently enrolled in a bachelor’s degree program majoring in Computer Science or a related field with a graduation date of Winter 2026 – Spring 2027

- Hands-on experience working in both Python and SQL

- Knowledge of Cloud or Big Data Technologies is a plus (Data Bricks, Spark in the Cloud, Hadoop)

- Proficient in Microsoft Office applications

- Excellent communication skills, ability and willingness to tackle complex problems

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Corporate Security Responsibility


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: