Software Engineer II

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
Software Engineer II
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 respect 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.
About the Role
Mastercard's ACI team within the Payment Enablement program is seeking to hire a Software Engineer II to design, develop, and deliver scalable, secure, and high-quality software solutions. In this role, you will contribute to the full software development lifecycle, from analysis and design to implementation and ongoing support, while collaborating with cross-functional teams to meet evolving business needs. You will play a vital role in a rapidly growing organization, working closely with experienced and driven engineers to solve complex challenges. Engineers work in small, flexible teams, with every member contributing to the design, development, and testing of features. We follow an Agile approach to software development and practice continuous integration and delivery.
This is a hybrid position based in O'Fallon, MO requiring three days per week onsite.
Role
• Design, develop, test, implement, and maintain software applications that align with Mastercard engineering standards and best practices. • Deliver secure, reliable, and scalable software solutions within defined timelines and budgets. • Research and evaluate alternative technical approaches to meet current and future business needs • Conduct feasibility studies, system flowcharting, and logic design to support solution development. • Collaborate with team members and stakeholders to meet project goals, identify issues early, and recommend practical solutions. • Independently manage assigned tasks and participate in production, incident management and on-call rotations. • Create and maintain comprehensive technical documentation in line with Mastercard's quality and governance standards. • Assist senior engineers in updating documentation and templates to align with evolving projects and technology needs. • Contribute to process improvement initiatives and promote best practices in software development and delivery. • Support the collection, analysis, and reporting of software and project performance metrics.
All About You
• Strong hands-on experience for developing scalable and high-performance applications with Java Spring Boot (Java 17 preferred). Spring Boot experience is required. Spring Batch experience is nice to have. • Proven experience with Apache KAFKA or related tools with event driven architecture design patterns for asynchronous data processing. • Knowledge and experience working with CI/CD tools such as Jenkins and Git is required. • Working knowledge of cloud platforms (PCF and/or AWS preferred). • Hands-on experience with containerization technologies (e.g., Docker). • Experience developing with web technologies such as HTML, JavaScript, and frameworks like Angular or React. • Solid understanding of database technologies, including both SQL and NoSQL systems. Experience with PostgreSQL is preferred. • Experience developing and integrating RESTful APIs and working within microservices architectures. • Strong grasp of object-oriented programming, software design patterns, and system performance optimization. • Proficient in algorithms, data structures, and distributed systems concepts. • Experience in Agile environments (e.g., Scrum or Kanban) with continuous integration and iterative delivery models. • Passionate about solving complex, real-world challenges through technology. • Self-motivated and proactive, with the ability to take ownership and deliver results in fast-paced, collaborative settings. • Excellent verbal and written communication skills, capable of explaining complex technical concepts to diverse audiences. • Bachelor's degree in computer science, Software Engineering, Information Technology, Mathematics, or related field is preferred.
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. 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