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Job Information

MasterCard Principal Software Engineer - Data Architecture in O'Fallon, Missouri

Our Purpose

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. Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. 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.

Job Title

Principal Software Engineer - Data Architecture


Mastercard software engineering teams leverage Agile development principles, advanced development and design practices, and an obsession over security, reliability, and performance to deliver solutions that delight our customers. We're looking for talented Software Data Engineer to join our product engineering team to help lead and design the next generation data ecosystems for Mastercard’s Rewards suite of products.

  • Are you a software data engineer passionate about building scalable, reliable systems that span multiple data centers and handle hundreds of millions of requests every day?

  • Do you enjoy seeing the impact your work has on a wide range of customers across the globe?

  • 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 own professional learning and development?

  • Do you thrive in a place where you are continuously learning more while growing your skills and career?


  • Current hands-on engineer who architects, designs, and implements how data is persisted, consumed, streamed. E.g., real time vs. near real time or in memory vs. disk in support of low latency systems

  • Drive the architectural design, including dependent services, service interactions and policies

  • Create or introduce, test, and deploy disruptive technology to optimize existing services and/or create new market opportunities

  • Design and build technical roadmaps to optimize services and functions with a focus on performance and cost/benefit optimization

  • Contribute to all parts of the data infrastructure and ecosystem including design, development, documentation, and testing

  • Have strong ownership of your team’s software and obsess over the maintenance characteristics, runtime properties and dependencies – including hardware, operating system, and build

  • Communicate, collaborate and work effectively in a global environment. Public speaking as a technology evangelist for Mastercard

About You:

  • Degree in Computer Science or related field

  • Expertise related to designing and developing change data capture using tools like Kafka, Debezium, Maxwell or similar technologies

  • Experience with large scale, high-performance data stream and patterns using tools Spark, Nifi or Presto

  • Deep Knowledge of databases, both SQL and NoSQL, including proper application of different data persistence technologies e.g. Cassandra, Yugabyte, Oracle, etc.

  • Knowledge of common data patters like event sourcing, change data capture, event carried state transfer, and data mesh

  • Expert foundation in algorithms, data structures and core computer science concepts – able to teach/mentor others in their learning

  • Hands-on experience designing and implementing large scale multi-tenant distributed data architecture for OLTP type systems

  • Development experience (currently hands on) in Java, Javascript, Spring MVC / Spring boot/ Web Services, Python.

  • Experience in data architecture cloud / cloud native technology

  • Experience with Agile development methodologies such as SAFE, SCRUM, Extreme Programming, TDD etc.

  • Experience working with a source versioning tool, such as Git

  • Strong written and verbal English communications skills – prior speaking/blogging engagements in technical forums and conferences

  • Strong analytical and excellent problem-solving skills

  • Mentor and teacher of new technologies and design patterns

  • Working experience in a cloud native environments like K8s, Azure, AWS is a plus

COVID-19 Considerations

We value the safety of each member of our community because we know we’re all in this together. In many locations, which may change over time, we’ve implemented a virtual hiring process and continue to interview candidates by video or phone. In addition, in some locations, only individuals who have been fully vaccinated will be permitted inside Mastercard offices until further notice.

In the US, Mastercard is a government contractor, which may legally require most Mastercard employees to be vaccinated unless a verified approved medical or religious exemption is granted. Further, we are currently making every effort towards having employees return to work in the office 2 days per week, if that makes sense for their team. Everyone must be vaccinated to enter Mastercard offices at this time. Therefore, we expect all candidates to be vaccinated or to be approved for a medical or religious accommodation prior to commencing work at Mastercard.

In the US, Mastercard is an inclusive Equal Employment 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. If you require accommodations or assistance to complete the online application process, please contact 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 information security violation or breach, and

  • Complete all periodic mandatory security trainings in accordance with Mastercard’s guidelines.

Requisition ID: R-170457