Software Engineer II (Java/Spring)

Mastercard; Greystones; On-site; EUR 70,000 - 90,000; Full time

Job summary

Mastercard is seeking a Software Engineer II to design, develop and maintain backend services and APIs in a Java/Spring stack. You will collaborate with cross-functional teams to translate requirements into robust software while ensuring security and reliability across platforms.

Ideal candidates have 3+ years in backend development, strong Java/Python skills, and experience with RESTful microservices, CI/CD, and distributed systems. This role is based in Ireland with on-site requirements.

Qualifications

• 3+ years of hands-on software engineering building backend services, APIs, or integration solutions.
• Strong programming experience in Java, Python, or similar modern language.
• Experience developing and consuming RESTful APIs with microservices-style architectures.
• Knowledge of software development lifecycle practices including design, coding, testing and production support.

Responsibilities

• Design, develop, test, and maintain backend services, APIs, and integration components.
• Build secure, scalable software solutions using modern engineering practices.
• Develop and support RESTful APIs and service-to-service integrations across platforms.
• Collaborate with product owners, architects, 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.
• Follow security, logging, monitoring, and operational readiness practices throughout the lifecycle.
• Troubleshoot production issues, perform root cause analysis, and contribute to reliability improvements.

Skills

Java development

API design

RESTful services

Tools

Git

Unix/Linux

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.