Lead Software Engineer

Careers.mastercard.com

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Dublin 18, Ireland Until 9/28/2026 First posted July 28, 2026 Last posted July 30, 2026
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

Lead Software Engineer

Who is Mastercard?

Mastercard is a global technology company in the payments industry. Our mission is to connect and power an inclusive, digital economy that benefits everyone, everywhere by making transactions safe, simple, smart, and accessible. Using secure data and networks, partnerships and passion, our innovations and solutions help individuals, financial institutions, governments, and businesses realize their greatest potential.

Our decency quotient, or DQ, drives our culture and everything we do inside and outside of our company. With connections across more than 210 countries and territories, we are building a sustainable world that unlocks priceless possibilities for all.

Overview

Be part of the Decision Management Program, which creates services for multiple business solutions to combat fraud and validate cardholder identity in real-time. Our patented platform processes billions of transactions per month, in milliseconds, using a multi-tiered, message-oriented approach for high performance and availability. Additionally, web applications and web services for managing fraud solutions round out the critical platform capabilities.

Role

This Lead Performance role will be responsible for the performance and availability engineering for the platform, along with helping to build an engineering practice that empathizes doing performance engineering work earlier in the delivery lifecycle.

This role will partner with solution architects, software engineers, and other team roles to assess the platform’s needs, help design new capabilities, design and run tests, help troubleshoot problems, identify risks, and make recommendations. A successful candidate will ensure potential performance and availability challenges are proactively identified, recommendations implemented, and that the systems’ capacity and availability exceed requirements while ensuring the platform achieves business results.

All About You

The ideal candidate for this position should possess intermediate to advanced knowledge and experience in the following areas:
• Application architecture
• High performance and highly scalable transaction processing systems
• Passionate about solving complex performance and availability problems
• A wide breadth and depth of technical experience including Java and GRPC
• Performance tools such as LoadRunner, JMeter, Gatling, Dynatrace, software profilers, Splunk, etc.
• Experience with Linux,Oracle/PostgreSQL,Kafka,Kubernetes and AWS
• Deep understanding of JVM internals,Garbage Collection,Threading models and Memory management
• Capacity modeling/planning processes and tools
• Strong verbal and written communication skills with the ability to communicate to an audience at all levels within an organization.

Education: Bachelor’s Degree in Computer Science, Engineering, or related technical field.

Corporate Security Responsibility

Every person working for, or on behalf of, Mastercard is responsible for information security. All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and therefore, it is expected that the successful candidate for this position must:

• 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.

Corporate Security Responsibility


All activities involving access to Mastercard assets, information, and networks comes with an inherent risk to the organization and, therefore, it is expected that every person working for, or on behalf of, Mastercard is responsible for information security and must:

  • 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.




About this role

Summary

Engineer performance, availability, and scalability of banking transaction platform

Job title

Lead Software Engineer

Experience level

intermediate to advanced

Industry

software

Location requirements

Dublin 18, Ireland, remote work not specified

Salary

Not specified

Management role

No

Skills & keywords

Required skills

application architecturejavaGRPCLoadRunnerJMeterGatlingDynatraceSplunkLinuxOraclePostgreSQLKafkaKubernetesAWSJVM internalsGarbage Collectionthreadingmemory managementcapacity modeling

Preferred skills

None specified

Specializations

performance engineeringjavakubernetesAWShigh performance
Locations

Structured locations inferred from the posting.

Unknown location

Work arrangement unknown