Senior Software Engineer

Our Purpose
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.
Title and Summary
Senior Software Engineer
Who is Mastercard?
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.
Who Are We?
The ABU team enables issuers and acquirers to securely communicate account changes for credential-on-file and recurring payments to merchants-increasing approval rates for card-not-present transactions, improving customer satisfaction, and reducing customer service demand. We're continuously making our services faster, more reliable, and scalable to meet emerging on-soil regulations and rising global demand.
Our vision: Consumers never have to think about where their payment credentials are stored.
Our value proposition: Reduce preventable declines and ensure a seamless cardholder experience when credential-on-file data changes.
We are modernizing the ABU platform and seeking strong, innovative Software Engineers with experience in domain-driven design. We're looking for individuals who can bring fresh perspectives, enjoy solving complex problems, and thrive in a dynamic, team-oriented environment. If you're passionate about building great software and ready to grow your career, we'd love to hear from you.
Role:
• Hands-on developer who writes high quality, secure code that is modular, functional and testable. • Create or introduce, test, and deploy new technology to optimize the service. • Manage individual project priorities, deadlines, and deliverables. • Apply best practices in software engineering, ensuring clean, efficient, and maintainable code using object-oriented programming (OOP) principles and modern frameworks. • Mentor junior engineers and contribute to team knowledge-sharing, fostering a culture of continuous improvement. • Collaborate with engineers to develop and maintain high-volume, high-performance Java applications. • Work with technical leads and product managers to define features and write user stories that align with project requirements. • Lead day-to-day system development and maintenance efforts, ensuring alignment with SLAs. • Seek opportunities to enhance standards and streamline processes, improving team efficiency. • Actively contribute to agile discussions and retrospectives to drive continuous improvement. • Troubleshoot and resolve complex technical issues in both the development and production environments. • Contribute to the entire software development lifecycle, including planning, coding, testing, deploying, and supporting applications.
All About You:
• Proven back-end development experience with expertise in microservices. • Proven expertise in Java development using frameworks such as Spring. • Strong background in RESTful APIs and JSON/SOAP-based APIs with Java. • Hands-on experience with messaging technologies such as Kafka, MQ, NATs, gRPC. • Experience working in cloud-native environments (e.g., AWS, Cloud Foundry). • Familiarity with Agile development practices. • Excellent knowledge of software engineering concepts and methodologies. • Experience building global-scale, high-quality solutions. • Strong verbal and written communication skills, with the ability to convey complex information to both technical and non-technical stakeholders. • Proactive problem-solver with a focus on identifying solutions and driving them to implementation.
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 [email protected] 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 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.
Pay Ranges
O'Fallon, Missouri: $115,000 - $184,000 USD