Senior Software Engineer - OP

Mastercard
Copenhagen, Denmark (Arne Jacobsens)Posted 22 March 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 Senior Software Engineer - OP 1. Overview Primary responsibilities • Reach deadlines for all tasks. • Reach quality goals (zero error policy). Area of responsibility: • Maintain mainframe systems and solutions • 1st level contact to IBM/Nets Service Management • Production duties • Quality assurance on the Operational setup 2. Role • Design and developing new Batch solutions • Architect responsible for Operation solutions • Support and performing test • Operational support to development and maintenance • Design standards for the mainframe Operational setup and documentation • QA on Changes • Proactive support in case of incidents Competence and experience • Knowledge in operating all payments and clearance systems in Nets • Mainframe z/OS operating system • Agile/Scrum • IBM IWS system • JCL • MQ • IMS • DB2 • AQT/QMF • SMS/HSM • XML • Beta92 • RMM (DFSMSrmm) • Connext Direct • Datamanager • Endevor • Product knowledge and connections • SLA’er • GT 3. All About You / Experience • Good Danish and English skills, both written and verbal • Good networking in the whole organization 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. Everyone wants easier ways to pay; we invent them. Checkout lines are slow; we speed them along. Merchants want more sales; we give them data and insights. People need financial access; we connect them. Corporate purchasing is complicated; we make it simple. Commuters are busy; we speed them on their way. Governments need greater efficiencies; we help create them. Small businesses are virtual; we give them access to a world of buyers. Retailers want to fight fraud; we provide the tools.
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