Lead Mainframe Engineer - Modernization & Impact

Mastercard; København; On-site; DKK 1,000,000 - 1,400,000; Full time

Benefits offered by this job

Career growth opportunities

Learning opportunities

Collaborative culture

Global impact

Job summary

Mastercard is seeking a Lead Mainframe Engineer to design, develop and maintain enterprise mainframe solutions that power its payment ecosystem. You will lead a team of engineers, shape architecture, and drive modernization initiatives while ensuring reliability, security, and operational excellence across critical platforms.

In this hands-on leadership role, you will mentor engineers, coordinate with cross-functional teams, and deliver high-availability transaction processing systems at scale,

Qualifications

• Strong experience developing, maintaining, and supporting enterprise mainframe applications.
• Deep knowledge of z/OS and associated technologies, including COBOL, JCL, CICS, IMS, DB2, MQ, and TSO.
• Experience building highly available, secure, and scalable transaction-processing systems.
• Strong understanding of system architecture, integration patterns, and enterprise application design.
• Experience with performance tuning, capacity planning, resiliency, and production support processes.
• Experience leading and developing engineering teams, including people management responsibilities.
• Ability to balance technical leadership, people leadership, operational excellence, and delivery commitments.
• Strong analytical, problem-solving, communication, and stakeholder management skills in a global environment.

Responsibilities

• Design, develop, and maintain enterprise-grade mainframe applications and services that support mission-critical business processes.
• Lead technical design and architecture discussions for complex mainframe solutions and integrations.
• Support the full software lifecycle, including analysis, design, development, testing, deployment, and production support.
• Develop and maintain solutions using technologies such as COBOL, JCL, CICS, IMS, DB2, MQ, and related mainframe technologies.
• Take ownership of end-to-end delivery, from requirements through implementation and ongoing operation.
• Troubleshoot and resolve production issues while ensuring high availability, performance, and operational stability.
• Collaborate with distributed systems, platform, infrastructure, product, and business teams to deliver integrated solutions.
• Improve automation, monitoring, resilience, performance, and operational efficiency across the mainframe environment.
• Ensure compliance with security, audit, and regulatory requirements.

Skills

Mainframe development

z/OS knowledge

COBOL

JCL

CICS

IMS

DB2

MQ

TSO

Performance tuning

Leadership

Stakeholder management

System architecture

Production support

Job description

Mastercard is seeking a Lead Mainframe Engineer to design, develop and maintain enterprise mainframe solutions that power its payment ecosystem. You will lead a team of engineers, shape architecture, and drive modernization initiatives while ensuring reliability, security, and operational excellence across critical platforms.

In this hands-on leadership role, you will mentor engineers, coordinate with cross-functional teams, and deliver high-availability transaction processing systems at scale,