Java Spring Boot Microservices Engineer - Event-Driven

Mastercard; O’Fallon (MO); On-site; USD 92,000 - 147,000; Full time

Job summary

Mastercard is seeking an experienced software engineer in Missouri to design, develop, and maintain Java/Spring Boot microservices for the Notification Manager platform. You will work on scalable, secure systems, participate in design discussions, and advance cloud-native deployment practices.

The role requires 2–5 years of experience, strong knowledge of REST/Microservices, and familiarity with Kafka or similar event-driven tech. On-site in OFallon, MO with competitive compensation and benefits.

Qualifications

• Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
• 2 to 5 years of software development experience.
• Hands-on experience building applications with Java and Spring Boot.
• Solid understanding of REST APIs and microservice-based architectures.
• Familiarity with messaging platforms or event-driven systems.
• grounding in software design principles, OOP, data structures, and algorithms.
• Experience with source control, peer code review, and CI/CD workflows.
• Working knowledge of SQL and relational databases.
• Strong troubleshooting and problem-solving capabilities.
• Ability to work independently on deliverables while collaborating in a team.

Responsibilities

• Design, develop, test, and maintain Java/Spring Boot microservices.
• Create software components and service interactions for scalability and reliability.
• Implement enhancements, new functionality, and defect resolutions across Notification Manager services.
• Participate in technical design discussions and translate requirements into working software.
• Write clean, maintainable, and secure code aligned with engineering standards.
• Build and maintain automated unit, integration, and API tests.
• Contribute to modern event-driven architectures using Kafka and distributed processing patterns.
• Shape system architecture and technical designs supporting scale and resilience.
• Support platform modernization: service decomposition, resiliency, performance, cloud-native deployment.
• Reduce technical debt and improve operational efficiency across the platform.
• Participate in production support, incident response, and root cause analysis.
• Monitor system health with observability tools and metrics.
• Analyze performance and implement improvements for throughput and latency.
• Troubleshoot application, infrastructure, and data-related issues.
• Support release activities and production readiness.
• Contribute to operability practices for reliability and monitoring.
• Collaborate with engineers, QA, PMTs, TPMs, and partner teams to deliver roadmap commitments.
• Participate in Agile ceremonies, estimation, and backlog refinement.
• Join peer code reviews to uphold quality, security, and standards.
• Contribute to technical documentation and knowledge sharing.
• Mentor junior engineers where appropriate.

Skills

Java

Spring Boot

REST APIs

Microservices

Object-oriented design

Data structures & algorithms

Source control (Git)

CI/CD

SQL & relational DBs

Troubleshooting

Independent with teamwork

Education

Bachelor's degree in Computer Science or Engineering

Tools

Kafka

Job description

Mastercard is seeking an experienced software engineer in Missouri to design, develop, and maintain Java/Spring Boot microservices for the Notification Manager platform. You will work on scalable, secure systems, participate in design discussions, and advance cloud-native deployment practices.

The role requires 2–5 years of experience, strong knowledge of REST/Microservices, and familiarity with Kafka or similar event-driven tech. On-site in OFallon, MO with competitive compensation and benefits.