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Software Engineer Intern, Summer

Job in O'Fallon, St. Charles County, Missouri, 63366, USA
Listing for: MasterCard
Seasonal/Temporary, Apprenticeship/Internship position
Listed on 2026-08-28
Job specializations:
  • Software Development
    Software Engineer, Java Developer, Software & AI Developer Internship
Salary/Wage Range or Industry Benchmark: 35 - 46 USD Hourly USD 35.00 46.00 HOUR
Job Description & How to Apply Below
Position: Software Engineer Intern, Summer 2027 – United States

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

Software Engineer Intern, Summer 2027 – United States

Why should I choose Mastercard’s internship program? Mastercard's internship program offers more than hands-on work. It provides an opportunity to build skills, expand your network, and make a meaningful impact while working on projects that support business priorities. It provides an opportunity to build skills, expand your network, and make a meaningful impact while working on projects that support business priorities.

About the team Mastercard’s Software Engineering teams design, build, and optimize high-performing, highly scalable software solutions and products for some of the world's top brands. Using advanced cloud platforms, AI frameworks, and secure blockchain technologies, your work will transcend borders, connecting communities and transforming commerce.

What you’ll do
  • Be a part of a real engineering team contributing to live systems and products.
  • Contribute to building scalable, high-performance systems used globally.
  • Write clean, efficient, and maintainable code using modern programming languages.
  • Support design, development, and testing of software features.
  • Write basic automated tests to verify code behavior.
  • Learn and apply secure coding practices.
  • Participate in code reviews, team discussions, and agile ceremonies.
  • Collaborate with product managers, designers, and engineers to deliver solutions.
  • Troubleshoot issues, debug code, and support enhancements.
  • Gain exposure to how enterprise software systems are built and maintained.
  • Note:

    responsibilities, projects, tools, technologies and programming languages will vary by team.
What we’re looking for
  • Currently pursuing a Bachelor’s degree in Computer Science, Engineering, or a related field graduating December 2027 and beyond
  • Basic understanding of programming languages such as Java, Python, C++, JavaScript, or similar
  • Strong foundation in data structures, algorithms, and core computer science concepts
  • Familiarity with version control (e.g., Git)
  • Interest in software testing, debugging, and problem solving
  • Curiosity, motivation, and a willingness to learn
Benefits
  • Mentorship and coaching from experienced professionals and leaders
  • Networking opportunities with fellow interns, employees, and senior leaders
  • Professional development experiences focused on career growth and skill-building
  • Exposure to innovative technologies and global business challenges
  • Volunteer, community engagement, and team-building activities

National Salary Range (Applies Regardless of Location): $35–$46 hourly

Mastercard is a merit-based, inclusive, equal opportunity employer that considers applicants without regard to gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law. We hire the most qualified candidate for the role.

In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment process, please contact reasonable and identify the type of accommodation or assistance you are requesting. Do not include any medical or health information in this email. The Reasonable Accommodations team will respond to your email promptly.

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:
Abide by Mastercard’s security policies and practices;
Ensure the confidentiality and integrity of the information being accessed;
Report any suspected…

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