Senior Java API Engineer – Fraud Platform

Mastercard; Greystones; On-site; EUR 110,000 - 140,000; Full time

Job summary

Mastercard is hiring a Senior Java Software Engineer to join our Dublin-based team working on a real-time decisioning platform. You will own features end-to-end across architecture, design, development, testing and deployment, delivering high-performance, distributed systems with low latency.

In an Agile environment you will mentor peers, drive coding standards, and partner with Product Owners to ensure robust releases and proactive operational excellence.

Qualifications

• Proficient in modern Java and distributed systems engineering.
• Experience with Spring, RESTful APIs and SQL databases.
• Familiarity with CI/CD pipelines and automated testing.

Responsibilities

• Own complex features across architecture, design, development and deployment.
• Design high-performance, scalable, secure Java capabilities and write design docs.
• Debug and troubleshoot multi-tier systems, including heap and thread analysis.
• Lead code reviews, enforce coding standards and drive testing strategies.
• Coordinate releases across multi-region teams and on-call support.
• Mentor teammates and share knowledge to raise the team's capability.

Skills

Java (JDK 17+)

Distributed systems

Multithreading

Spring Framework

RESTful APIs

SQL

JUnit testing

Agile (SAFe/SCRUM)

Code quality

Security best practices

Education

Bachelor's degree in Computer Science or related field

Tools

Jenkins

Maven

Tomcat/JBoss

Redis

Geode/Hazelcast

Job description

Mastercard is hiring a Senior Java Software Engineer to join our Dublin-based team working on a real-time decisioning platform. You will own features end-to-end across architecture, design, development, testing and deployment, delivering high-performance, distributed systems with low latency.

In an Agile environment you will mentor peers, drive coding standards, and partner with Product Owners to ensure robust releases and proactive operational excellence.