Jobs / Ireland / Mastercard International Incorporated
Senior Software Engineer (API) – Fraud Platform
Mastercard International Incorporated · 🌍 Dublin, Ireland
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Sponsor Radar — Mastercard International Incorporated
No government sponsor record covers this employer in this country.
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About the role
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 Senior Software Engineer (API) – Fraud Platform SENIOR SOFTWARE ENGINEER (JAVA) — DATA CACHING / DISTRIBUTED SYSTEMS Location: Dublin, Ireland OVERVIEW We are hiring a Senior Java Software Engineer to join a Dublin-based engineering team working on Mastercard's real-time decisioning platform. The team designs, builds and operates a high-performance, distributed, in-memory data caching layer that supports mission-critical transaction processing at global scale, with a strong focus on low latency, high availability and resiliency. This is a hands-on senior role for an engineer who enjoys working close to complex distributed systems, owning features end-to-end, and helping shape technical direction within a collaborative Agile team. • Want to work on industry-leading, mission-critical distributed systems at global scale? • Motivated by solving complex performance, resiliency and data-consistency problems? • Keen to take end-to-end ownership and mentor others in a high-trust team? ROLE & KEY RESPONSIBILITIES As a Senior Software Engineer, you will act as a technical owner and leader within the team: • End-to-end delivery — Own complex features and services across the full software development lifecycle: architecture, design, development, testing, deployment, rollback planning and documentation. • Design & innovation — Design and implement high-performance, scalable and secure Java capabilities; apply advanced design patterns and API standards; produce high- and low-level design documentation to a professional standard. • Independent problem-solving — Drive solutions for complex problems; debug and troubleshoot across multi-tiered systems, including core, heap and thread-dump analysis; design resilient solutions. • Technical leadership & influence — Lead code, design and process trade-off discussions; drive adoption of coding standards and frameworks; review code, tests and automation produced by other team members. • Release & delivery coordination — Support coordinated releases across a follow-the-sun, multi-region engineering model, including scope tracking, cross-team sign-offs and release execution. • Operational excellence — Participate in on-call support; lead incident management, root-cause analysis and remediation; proactively improve performance and stability metrics. • Stakeholder engagement — Contribute to prioritisation with Product and Business stakeholders; lead demos and acceptance discussions with Product Owners; report status and manage risks in owned service areas. • Mentoring & knowledge sharing — Mentor less-experienced engineers, deliver knowledge-transfer and brown-bag sessions, and help build shared understanding across the team. • Continuous improvement — Identify inefficiencies and drive automation of build, operate and run activities; research and evaluate emerging technologies and frameworks. REQUIRED SKILLS & EXPERIENCE • Strong proficiency with modern Java (JDK 17 or later); distributed systems and multi-threading experience. • Experience with Spring, Spring Boot, Hibernate, RESTful APIs, JSON; application servers (e.g. JBoss/Tomcat); Shell scripting. • Experience with distributed caching or in-memory data grid technologies (e.g. Apache Geode, Hazelcast, Redis, Coherence) is high