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Job Title: Senior Software Engineer
Company Name: Mastercard
Location: O'Fallon, MO United States
Position Type: Full Time
Post Date: 01/16/2026
Expire Date: 02/15/2026
Job Categories: Computers, Software, Engineering, Information Technology
Job Description
Senior Software Engineer

Our Purpose

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.

Title and Summary

Senior Software Engineer

At Mastercard, our industry expertise is enhanced by our commitment to being a force for good in the world and to doing well by doing good. Mastercard relies on our global workforce to help us achieve our goal of building a sustainable, inclusive global economy. The Mastercard Way encourages us, connects us with the behaviors that represent the essence of not only what we do but who we are as an organization. Cultivating an environment for all employees that respects their strengths, views, and experiences drives a global and collaborative culture of inclusion and a sense of belonging.

About the Role

Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and an obsession with security, reliability, and performance to deliver solutions that delight our customers. We are looking for talented software engineers to develop advanced technologies and applications that are revolutionizing payments.

- Are you passionate about software engineering?
- Do you enjoy seeing the impact your code has on a wide range of customers which improves their experience?
- Do you want to work for a company that offers above and beyond benefits including paid parental leave, flexible work hours, gift matching, and even volunteer incentives while encouraging your professional learning and development?
- Do you thrive in a place where you are continuously learning more while growing your skills and career?
- Do you want to join a Company that offers a competitive benefits-and rewards program that attracts, develops, and retains the most talented employees around the world?
- Do you want to join an inclusive culture where employees, in all their diversity, feel valued, respected, and who can bring their authentic selves to work? Learn more at Mastercards Corporate Sustainability Report.

Role

- Hands-on engineer to contribute to all parts of the softwares development including design, development, documentation, and testing.
- Writes and test high-quality, secure code that is modular, functional, and testable.
- Have strong ownership of your teams software and are deep in the maintenance characteristics, runtime properties, dependencies, and build.
- Communicate, collaborate and work effectively in a global environment.

All About You

- Strong foundation in algorithms, data structures, and core computer science concepts with evidence working with object-oriented development and design patterns
- Advanced experience developing microservice applications with JAVA in the Spring Boot Framework
- Strong background in RESTful APIs
- Proficient with object-relational databases, such as PostgreSQL
- Hands-on experience with messaging technologies, such as KAFKA, MQ, gRPC
- Experience working in cloud-native environments (e.g., AWS, PCF, GCP, Azure)
- Clear knowledge and experience with application testing and automation
- Strong written and verbal English communication skills
- Strong analytical and excellent problem-solving skills
- Working knowledge of an Agile environment

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.

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 Mastercards 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 Mastercards guidelines.

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.

Pay Ranges

O'Fallon, Missouri: $115,000 - $184,000 USD

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Contact Information
Company Name: Mastercard
Website:https://click.appcast.io/t/_stxzS6TWXUKZ_laF9GXtHbEaleUSW1jMNzT-o48UT3ew8U6vxuEf7whX2F4jElF
Company Description:

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