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Software Engineer II
Company: Mastercard
Location: O'Fallon, MO
Employment Type: Full Time
Date Posted: 05/22/2026
Job Categories: Computers, Software, Engineering, Information Technology
Job Description
Software Engineer II
<p><span><b>Our Purpose</b></span></p><p></p><p><i>Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build asustainableeconomy where everyone can prosper. We support a wide range of digital payments choices, making transactionssecure, 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.</i></p><p></p><p><b>Title and Summary</b></p><h3></h3><p></p>Software Engineer II<h3></h3><p style="text-align:inherit"></p>Overview<br>The Transaction Switching team is looking for a Software Engineer II to help drive our software delivery strategy forward by building secure, reliable, and scalable cloud-native solutions. The ideal candidate is passionate about software engineering, highly motivated, intellectually curious, collaborative, and committed to delivering high-quality services that support customer and business needs.<br><br>Role<br>In this position, you will:<br>Analyze, design, develop, and deliver software solutions with an emphasis on cloud-native microservices<br>Partner with development teams, product management, and scrum masters to clarify requirements, solve problems, and deliver secure software solutions <br>Write maintainable and efficient code to build and enhance applications, services, and REST APIs<br>Apply appropriate data structures and design principles to ensure performance, scalability, and maintainability<br>Participate in agile scrum ceremonies, contribute to story estimation, and follow team working agreements, coding standards, and engineering best practices<br>Participate in code reviews, code scanning, unit testing, and other development practices to deliver high-quality artifacts to production<br>Contribute to test automation strategy and help simplify or automate aspects of software development and delivery<br>Troubleshoot, debug, and resolve technical issues using a structured and analytical approach<br>Participate in a blameless postmortem culture by helping identify root causes of incidents and applying learnings to improve system reliability<br><br>All About You<br>The ideal candidate for this position should:<br>Have a Bachelors degree in Computer Science or equivalent education or experience. <br>Demonstrate intermediate to advanced knowledge of Java, Spring Boot, and REST API development<br>Understand relational database concepts and have experience working with databases such as Oracle or PostgreSQL<br>Be familiar with CI/CD concepts, unit testing, test-driven development, and test automation practices<br>Be committed to building secure, reliable, scalable, and maintainable software using established standards and best practices<br>Be comfortable working in an agile scrum environment and collaborating with engineers, product managers, scrum masters, and other stakeholders<br>Demonstrate the ability to troubleshoot technical issues and optimize system performance through structured problem-solving<br>Be a continuous learner who actively shares software engineering practices and contributes to team or engineering community initiatives<h3></h3><p style="text-align:inherit"></p>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_accommodation@mastercard.com 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.<h3></h3><p style="text-align:inherit"></p><p style="text-align:left"><b>Corporate Security Responsibility</b></p><p style="text-align:left"><br />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:</p><ul><li><p style="text-align:left">Abide by Mastercards security policies and practices;</p></li><li><p style="text-align:left">Ensure the confidentiality and integrity of the information being accessed;</p></li><li><p style="text-align:left">Report any suspected information security violation or breach, and</p></li><li><p style="text-align:left">Complete all periodic mandatory security trainings in accordance with Mastercards guidelines.</p></li></ul><p style="text-align:inherit"></p><p style="text-align:inherit"></p><h3></h3><p style="text-align:inherit"></p>In line with Mastercards total compensation philosophy and assuming that the job will be performed in the US, the successful candidate will be offered a competitive base salary and may be eligible for an annual bonus or commissions depending on the role. The base salary offered may vary depending on multiple factors, including but not limited to location, job-related knowledge, skills, and experience. Mastercard benefits for full time (and certain part time) employees generally include: insurance (including medical, prescription drug, dental, vision, disability, life insurance); flexible spending account and health savings account; paid leaves (including 16 weeks of new parent leave and up to 20 days of bereavement leave); 80 hours of Paid Sick and Safe Time, 25 days of vacation time and 5 personal days, pro-rated based on date of hire; 10 annual paid U.S. observed holidays; 401k with a best-in-class company match; deferred compensation for eligible roles; fitness reimbursement or on-site fitness facilities; eligibility for tuition reimbursement; and many more. Mastercard benefits for interns generally include: 56 hours of Paid Sick and Safe Time; jury duty leave; and on-site fitness facilities in some locations.<p style="text-align:inherit"></p><p style="text-align:left"><b>Pay Ranges</b></p>O'Fallon, Missouri: $92,000 - $147,000 USD<h3></h3><p style="text-align:inherit"></p><h3></h3><p style="text-align:inherit"></p><h3></h3><p style="text-align:inherit"></p><h3></h3><p style="text-align:inherit"></p>
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