Senior Software Engineer

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. Senior Software Engineer Job Description Overview The MDES team is looking for a Senior Software Development Engineer to develop microservices-based enterprise applications using Java J2EE stack, including portals for customer care, end users, and customer representatives. The ideal candidate is passionate about designing and developing high-quality, scalable, and highly available code. Responsibilities Develop enterprise applications with quality, on schedule, and within effort estimates. Assist lead engineers in low-level design. Provide effort estimates for assigned tasks. Write and execute unit and integration tests. Provide accurate task status updates. Perform peer reviews and mentor junior team members. Comply with organizational processes and policies, protect intellectual property, and participate in process improvements and knowledge sharing. Required Skills & Attributes Hands-on experience with core Java, Spring Boot, Spring MVC, IOC, AOP, Security, SQL, RDBMS (Oracle, Postgres), Web services (JSON, SOAP), Kafka, Zookeeper. Experience developing microservices and deploying on cloud platforms like Google Cloud, AWS, or Azure. Proficiency with IDEs such as IntelliJ, Eclipse, or MyEclipse. Experience writing JUnit test cases, working with Maven, Ant, Gradle, and GIT. Knowledge of Design Patterns. Experience working with Agile methodologies. Strong logical, analytical, and design skills; excellent communication skills in English. Knowledge of security concepts like authentication, authorization, and confidentiality. Preferred Skills Experience in payments application domain. Experience with tools like Mockito, JBehave, Jenkins, Bamboo, Confluence, Rally. Corporate Security Responsibility All activities involving access to Mastercard assets, information, and networks come with inherent risks. Employees must: Follow Mastercard’s security policies and practices. Ensure confidentiality and integrity of accessed information. Report security violations or breaches. Complete mandatory security trainings. Compensation and Benefits In line with Mastercard’s compensation philosophy, the role offers a competitive base salary, with potential bonuses or commissions. Benefits include health insurance, paid leave, 401(k), tuition reimbursement, fitness facilities, and more. The salary range for O'Fallon, Missouri is $115,000 - $184,000 USD. #J-18808-Ljbffr