Software Engineer II

Software Engineer II

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.

We work 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. We cultivate a culture of inclusion for all employees that respects their individual strengths, views, and experiences. We believe that our differences enable us to be a better team – one that makes better decisions, drives innovation, and delivers better business results.

Software Engineers II at Mastercard design and code artificial intelligence, cloud, and machine learning platforms that provide mission-critical insights to many of the world's leading organizations and governments. As a Software Engineer, you will develop these products and solutions with speed and agility as part of a small team. This will involve developing high-performing, highly scalable software solutions and products for some of the world's top brands. Specific tasks vary depending on the project and the business unit that you join.

Role:

• Design, build, test, deploy, and maintain scalable applications and microservices
• Develop REST APIs using Java and Spring Boot with a focus on performance and reliability
• Apply software development, design, and architecture principles to deliver secure and scalable solutions
• Contribute to CI/CD pipelines (Jenkins) to improve delivery speed and quality
• Own work end-to-end, from design through production support
• Write and maintain unit and integration tests; contribute to test automation (JUnit, Selenium, RestAssured, Cucumber)
• Improve test coverage and overall software quality
• Apply secure coding practices and support vulnerability remediation (CVE remediation, upgrade automation)
• Identify and improve performance and scalability issues
• Participate in code reviews and follow engineering best practices
• Troubleshoot and resolve issues using structured debugging and tools like logging/monitoring (Splunk)
• Contribute to system reliability, operability, and monitoring
• Collaborate with team members and contribute to technical discussions and knowledge sharing
• Leverage AI tools to improve development productivity and ensure outputs are validated for quality and security

All About You:

• Experience building RESTful services using Java and Spring Boot
• Hands-on experience developing and deploying applications (Java, Python, or C#)
• Understanding of microservices architecture and CI/CD pipelines
• Familiarity with event-driven architecture (Kafka, Axon)
• Ability to apply design patterns and structure code for maintainability
• Understanding of system design, scalability, and integrations
• Experience with unit and integration testing (JUnit or similar)
• Experience with test automation tools (Selenium, RestAssured, Cucumber)
• Ability to identify and improve performance issues
• Knowledge of secure coding practices and vulnerability management
• Experience using logging/monitoring tools (Splunk)
• Strong understanding of data structures and problem-solving
• Experience with code reviews and collaborative development
• Ability to troubleshoot and resolve application and system issues
• Familiarity with cloud environments (AWS, PCF) is a plus
• Bachelor's degree or equivalent experience

Corporate Security Responsibility:

• 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.

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 View email address on click.appcast.io 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.

In line with Mastercard's 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.

Pay Ranges:

O'Fallon, Missouri: $92,000 - $147,000 USD