Software Engineer II (Java/Spring)

Mastercard; Blackrock; On-site; EUR 70,000 - 110,000; Full time

Job summary

Mastercard in Ireland is seeking a Software Engineer II (Java/Spring) to design, build, test, and maintain backend services and APIs that power critical platforms.

You will work on secure, scalable solutions, develop RESTful APIs, collaborate with product owners, architects, and data teams, and contribute to CI/CD and production support to ensure reliable delivery.

Qualifications

• 3+ years hands-on software engineering experience building backend services and APIs.
• Strong Java and Spring background.
• Experience with RESTful APIs and microservices architecture.
• Familiarity with CI/CD and production support practices.
• Experience with SQL and relational data stores.
• Git, Unix/Linux environments, and shell scripting.
• Understanding of secure coding practices and data protection.

Responsibilities

• Design, develop, test, and maintain backend services, APIs, and integration components.
• Build secure, scalable, maintainable software solutions using modern engineering practices.
• Develop and support RESTful APIs, service-to-service integrations, and data exchange across platforms.
• Collaborate with product owners, architects, engineers, data engineers, and data scientists to translate requirements into technical solutions.
• Participate in design discussions, code reviews, testing, and release activities to ensure high-quality delivery.
• Apply secure coding, logging, monitoring, and operational readiness practices throughout the lifecycle.
• Troubleshoot production issues, perform root cause analysis, and improve reliability and supportability.
• Contribute to automation, CI/CD pipelines, and engineering process improvements.

Skills

Java

REST APIs

Backend development

CI/CD

Troubleshooting

Security practices

Tools

Git

Unix/Linux

Shell scripting

CI/CD pipelines

Job description

Our Purpose

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.

Title and Summary

Software Engineer II (Java/Spring)

Job Overview:

• Design, develop, test, and maintain backend services, APIs, and integration components that support business and technology capabilities.
• Build secure, scalable, and maintainable software solutions using modern engineering practices.
• Develop and support RESTful APIs, service-to-service integrations, and data exchange patterns across internal platforms.
• Collaborate with product owners, architects, software engineers, data engineers, and data scientists to translate requirements into technical solutions.
• Participate in design discussions, code reviews, testing, and release activities to ensure high-quality software delivery.
• Apply secure coding, logging, monitoring, and operational readiness practices throughout the development lifecycle.
• Troubleshoot production issues, perform root cause analysis, and contribute to long-term improvements in reliability and supportability.
• Contribute to automation, CI/CD pipelines, and engineering process improvements that reduce manual effort and improve delivery speed.
• Follow Mastercard technology, security, privacy, and compliance standards in the design and implementation of solutions.

Essential Skills & Experience

• 3+ years of hands-on software engineering experience building backend services, APIs, or integration solutions.
• Strong programming experience in Java, Python, or a similar modern programming language.
• Experience developing and consuming RESTful APIs and working with service-based or microservices-style architectures.
• Good understanding of software development lifecycle practices, including design, coding, testing, code review, CI/CD, and production support.
• Experience with SQL and relational or analytical data stores.
• Familiarity with Git, Unix/Linux environments, shell scripting, and automated build/deployment pipelines.
• Strong debugging, troubleshooting, and problem-solving skills, including the ability to independently investigate and resolve technical issues.
• Understanding of secure coding practices, authentication/authorization patterns, data protection, and operational controls.
• Excellent communication skills, with a collaborative approach to working across engineering, data science, product, and architecture teams.

Preferred Qualifications

• Experience with Java/Spring Boot or similar backend application frameworks.
• Experience with API gateways, integration platforms, event-driven patterns, messaging, or batch/streaming integration approaches.
• Exposure to AI/ML-enabled platforms, model integration patterns, or data-driven applications.
• Experience with observability tools, logging, monitoring, alerting, and production support practices.
• Exposure to Agile delivery methods and working in cross-functional delivery teams.
• Ability to work across multiple priorities while maintaining a strong sense of ownership and delivery accountability.
• Proactive, self-motivated, and comfortable operating in a fast-paced technology environment.

Corporate Security Responsibility

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