Software Engineer Decision Management

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

Requirements

Must have

• We are looking for a bachelors degree in Computer Science, Engineering, or equivalent practical experience.
• We require 2 to 5 years of software development experience.
• We need hands‑on experience building applications with Java and Spring Boot.
• We expect a solid understanding of REST APIs and microservice‑based architectures.
• We value familiarity with messaging platforms or event‑driven systems.
• We look for strong grounding in software design principles, object‑oriented programming, data structures, and algorithms.
• We expect experience with source control, peer code review, and CI/CD workflows.
• We require working knowledge of SQL and relational databases.
• We look for strong troubleshooting and problem‑solving capabilities.
• We need someone who can work independently on assigned deliverables while collaborating effectively within a team.

Preferred

• Preferred: experience with event‑driven architectures such as Kafka, MQ, or similar technologies.
• Preferred: exposure to cloud platforms, PCF/Tanzu, Kubernetes, or containerized environments.
• Preferred: knowledge of distributed systems concepts such as resiliency, fault tolerance, scalability, architecture, and performance tuning.
• Preferred: experience with observability tools such as Splunk, Dynatrace, Grafana, or Prometheus.
• Preferred: familiarity with CI/CD pipelines and automated testing frameworks.
• Preferred: exposure to PCI, security, or regulatory requirements.
• Preferred: experience in high‑volume transaction processing systems.

Responsibilities:

• We design, develop, test, and maintain Java/Spring Boot microservices.
• We create software components and service interactions that meet scalability, maintainability, and reliability needs.
• We implement enhancements, new functionality, and defect resolutions across Notification Manager services.
• We take part in technical design discussions and turn requirements into working software.
• We write clean, maintainable, and secure code aligned with our engineering standards.
• We build and maintain automated unit, integration, and API tests.
• We contribute to modern event‑driven architectures using Kafka and distributed processing patterns.
• We help shape system architecture and technical designs that support scale, resilience, and long‑term evolution.
• We support platform modernization efforts, including service decomposition, resiliency improvements, performance optimization, and cloud‑native deployment practices.
• We help reduce technical debt and improve operational efficiency across the platform.
• We participate in production support, incident response, and root cause analysis.
• We monitor system health using observability tools and metrics.
• We analyze application performance and implement improvements to enhance throughput, latency, scalability, and resource efficiency.
• We troubleshoot application, infrastructure, and data‑related issues.
• We support release activities and production readiness efforts.
• We contribute to operability practices that strengthen reliability, monitoring, and supportability.
• We work closely with engineers, QA, PMTs, TPMs, and partner teams to deliver roadmap commitments.
• We participate in Agile ceremonies, elaboration sessions, estimation, and backlog refinement.
• We join peer code reviews to uphold code quality, maintainability, security, and engineering standards.
• We contribute to technical documentation and knowledge sharing.
• We assist and mentor junior engineers where appropriate.

We are Mastercard, a global technology company that powers economies and helps people and businesses prosper in more than 200 countries and territories. Our Notification Manager team sits within the Decision Management Program and builds the enterprise notification platform that processes high‑volume transaction events and delivers customer‑facing alerts through email, SMS, and API channels. This role is part of a collaborative engineering environment where we work with Product, TPMs, Architects, QA, and partner teams to deliver scalable, resilient, and secure solutions. We offer competitive compensation, potential bonus or commission eligibility, and a broad benefits package that may include medical, dental, vision, life and disability coverage, paid leave, vacation, holidays, retirement support, fitness reimbursement or facilities, and tuition assistance. This position is based in OFallon, Missouri, with a stated pay range of $92,000 to $147,000 USD.