Lead Platform Engineer

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 Lead Platform Engineer Job Specification – Lead Platform Engineer Location Dublin Role Overview We are seeking an experienced Lead Platform Engineer with strong expertise in PostgreSQL and Cassandra database technologies. The successful candidate will be responsible for the build, design, engineering, administration, automation, and operational support of mission-critical database platforms across Mastercard. The role requires a proactive individual who can ensure high availability, reliability, scalability, performance, and compliance across enterprise database environments while supporting cloud adoption, platform modernization, and automation initiatives.

Database Administration & Operations • Build, administer, maintain, and support enterprise PostgreSQL and Cassandra database environments. • Perform database installations, upgrades, patching, migrations, and configuration management. • Manage backup, recovery, and disaster recovery solutions. • Monitor database health, availability, performance, and capacity. • Troubleshoot and resolve database incidents and performance issues. • Ensure database environments meet security, governance, and compliance requirements. • Support additional database platforms including Oracle, MongoDB, Redis, and SQL Server where required. Performance & Reliability • Analyse and optimise database performance through query tuning, indexing strategies, and database configuration improvements. • Implement and support high-availability, replication, clustering, and failover technologies. • Conduct capacity planning and performance forecasting. • Develop automation solutions to improve operational efficiency and reduce manual intervention. • Establish observability practices and proactive monitoring across database platforms. Architecture & Engineering • Design scalable, resilient, and secure database solutions leveraging PostgreSQL and Cassandra technologies. • Support database modernization, cloud adoption, and migration initiatives. • Collaborate with infrastructure, application development, platform engineering, and security teams. • Provide technical leadership and guidance on database architecture, operational standards, and best practices. • Evaluate and recommend emerging database technologies and platform improvements. Automation & DevOps • Develop and maintain Infrastructure as Code and database automation solutions. • Support CI/CD processes involving database deployments and schema changes. • Implement monitoring, observability, and automated remediation capabilities across database platforms. • Improve platform reliability through automation, standardization, and self-service capabilities. Required Skills & Experience Essential Technical Skills PostgreSQL • Extensive experience managing PostgreSQL databases in large-scale production environments. • Experience with PostgreSQL replication, clustering, backup, recovery, and high-availability solutions. • Strong understanding of PostgreSQL architecture, performance tuning, optimisation, and troubleshooting. • Experience implementing and supporting failover and disaster recovery solutions. • Knowledge of PostgreSQL security, access controls, and governance practices. Cassandra • Strong hands-on experience administering and supporting Apache Cassandra environments. • Deep understanding of Cassandra architecture, data modelling,