Mastercard
O'Fallon, MO
Software Engineer Intern, Summer 2027 – United States
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Apply to Software Engineer Intern, Summer 2027 – United States at MastercardJob details
- Location
- O'Fallon, MO
- Work type
- Onsite
- Posted
- 3 weeks ago
- Apply on
- mastercard.wd1.myworkdayjobs.com
About this role
Mastercard is a global payments and technology company that supports secure, accessible digital transactions worldwide. The Software Engineer Intern will build foundational engineering skills, contribute to scalable and secure software systems, write and test code, troubleshoot issues, and collaborate with cross-functional teams.
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
- Mentorship and coaching from experienced professionals and leaders
What they'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
- 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
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
- 56 hours of Paid Sick and Safe Time
- Jury duty leave
- On-site fitness facilities in some locations
- May be eligible for an annual bonus or commissions depending on the role
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