Software Engineer II – Notification Manager

Mastercard is building an enterprise notification platform as part of its Decision Management Program (DMP), and the Notification Manager team needs a Software Engineer II to help deliver customer-facing communications at scale. In this onsite role in O’Fallon, MO, you will design, develop, test, deploy, and support backend services that power distributed, event-driven microservices for notifications delivered via email, SMS, and API channels.

Role overview

You will work on Java and Spring Boot microservices that enhance and extend Notification Manager services, contributing to platform modernization efforts such as service decomposition, resiliency improvements, performance optimization, and cloud-native deployment practices. The work also includes production support responsibilities, incident response, and root cause analysis to keep the platform reliable and efficient.

Responsibilities

• Design, develop, test, and maintain Java/Spring Boot microservices.
• Implement enhancements, new features, and defect fixes across Notification Manager services.
• Participate in technical design discussions and translate requirements into working software.
• Write clean, maintainable, and secure code aligned with Mastercard engineering standards.
• Develop and maintain automated unit, integration, and API tests.
• Contribute to modern event-driven architectures using Kafka messaging and distributed processing patterns.
• Support platform modernization, including service decomposition, resiliency, performance optimization, and cloud-native deployment practices.
• Help reduce technical debt and improve operational efficiency across the platform.
• Participate in production support, incident response, and root cause analysis.
• Monitor system health using observability tools and metrics, and troubleshoot application, infrastructure, and data-related issues.
• Support release activities and production readiness efforts.
• Collaborate with engineers, QA, PMTs, TPMs, and partner teams to deliver roadmap commitments.
• Participate in Agile ceremonies including elaboration, estimation, and backlog refinement.
• Contribute to technical documentation and knowledge sharing, and assist or mentor junior engineers as appropriate.
• Independently deliver stories and enhancements from design through production deployment.
• Demonstrate ownership of one or more Notification Manager services or technical domains.
• Continuously improve technical knowledge and team engineering practices.

Requirements

• Bachelor’s degree in Computer Science, Engineering, or equivalent experience.
• 2–5 years of software development experience.
• Experience developing applications using Java and Spring Boot.
• Understanding of REST APIs and microservice architectures.
• Familiarity with messaging or event-driven systems.
• Experience with source control, code reviews, and CI/CD practices.
• Working knowledge of SQL and relational databases.
• Strong troubleshooting and problem-solving skills.
• Ability to work independently on assigned deliverables while collaborating effectively within a team.

Technologies

• Java (JDK 17)
• Spring Boot
• Kafka Messaging
• REST APIs
• Oracle / SQL
• GitHub / Bitbucket
• CI/CD Pipelines
• Splunk, Dynatrace
• PCF / Tanzu
• Distributed Event-Driven Architecture

Preferred qualifications

• Experience with event-driven architectures (Kafka, MQ, or similar).
• Experience with cloud platforms, PCF/Tanzu, Kubernetes, or containerized workloads.
• Knowledge of distributed systems concepts including resiliency, fault tolerance, and scalability.
• Experience with observability tools such as Splunk, Dynatrace, Grafana, or Prometheus.
• Familiarity with CI/CD pipelines and automated testing frameworks.
• Exposure to PCI, security, or regulatory requirements.
• Experience working in high-volume transaction processing systems.

Benefits

• 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

Corporate security responsibilities

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

Pay range

O’Fallon, Missouri: $92,000 - $147,000 USD (per year)