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Senior Software Engineer



Software Engineering
O'Fallon, IL, USA
Posted on Friday, May 24, 2024

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.

Title and Summary

Senior Software Engineer


At Mastercard Commercial Solutions, we empower businesses to succeed through innovative, trusted payment solutions that deliver a seamless, digital-first experience around the world.
We’re building a global business-to-business (B2B) technology platform to help businesses of all sizes streamline how they manage payments when buying or selling products and services.

Mastercard Commercial Solutions team is looking for a Senior Software Engineer to drive our customer experience strategy forward by consistently innovating and problem-solving. The ideal candidate is passionate about the customer experience journey, highly motivated, intellectually curious, analytical.


You will work in our Mastercard technology location in O'Fallon, which provides a state-of-the-art environment for technology teams to thrive in our collaborative, Agile engineering culture. You will play a key role in how Mastercard transforms the B2B space to standardize, automate, and optimize digital payment efficiency for buyers and sellers.
• Own software delivery tasks (design, development, test, deployment, support, documentation, configuration) at an application/software component level
• Full stack developer that can code and build front end and REST API/backend applications
• Participate in all the scrum ceremonies using Agile methodology.
• Drive code/design/process trade-off discussions within their team when required
• Drive adoption of engineering principles, technology standards and best practice, and review coding, test, and automation work of team members
• Develop complete understanding of end-to-end technical architecture and dependency systems
• Mentor and guide new and less-experienced team members
• Write code to do unit testing, integration testing, functional and regression testing.
• Provide support by troubleshooting production incidents and implementing corrective and preventive actions
• Share and seek knowledge within their Guild/Program to drive reuse of patterns/libraries/practices and enhance productivity

All About You

Required Experience
• Full stack developer with ability to write secure code in backend & frontend programming languages (Java, JavaScript, Angular, SQL) and familiar with secure coding standards and vulnerability management
• Excellent knowledge of Spring, Spring Data JPA, REST, Kakfa and other frameworks.
• Understands and builds test code at unit level, service level, and integration level to ensure code and functional coverage (e.g. JUnit, Mockito,Jasmine etc) \
• Familiar with different application and design patterns to implement different types of business processes (e.g., APIs, event-driven-services, batch-services, UI-applications)
• Understands and implements Application Programming Interface (API) standards and cataloging to drive API/service adoption and commercialization
• Applies tools (e.g., Sonar, Zally, Checkmarx, Blackduck) and techniques to scan and measure code quality and anti-patterns as part of development activity
• Has skills to orchestrate release workflows and pipelines and apply standardized pipelines via APIs to achieve CI and CD using industry standard tools (e.g., Jenkins, XL Release, others).
• Excellent at problem-solving with creative troubleshooting skills
• Strong organizational skills; able to manage multiple tasks within the constraints and timelines determined by business needs.
• Self Starter, Proactive and Passionate about continuous improvement and delivering results
• Thrives in an environment that is fast-paced, rapidly changing, and customer-oriented
• Has skills to promote and coach teams on take on full stack development and facilitate end-to-end service ownership
• Has good verbal and written communication skill.
• Bachelor’s degree in computer science, Software Engineering, or a related field
• 7+ years of IT experience

Desirable Skills
• Experience with monitoring tools like Splunk or Dynatrace

Mastercard is an 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. In the US or Canada, if you require accommodations or assistance to complete the online application process or during the recruitment 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.

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 based on location, experience and other qualifications for the role and may be eligible for an annual bonus or commissions depending on the role. 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 new parent leave, up to 20 paid days bereavement leave), 10 annual paid sick days, 10 or more annual paid vacation days based on level, 5 personal days, 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, gender-inclusive benefits and many more.