Senior Software Engineer for Mainframe

Job Description

You would join the Customer Capabilities tribe – an international organisation of 100+ professionals working across Denmark, Lithuania, and India. The tribe owns core banking domains such as Fees, Interest, Tax Reporting, and Customer Communication.

About the role

This role is ideal for a backend engineer who enjoys understanding complex systems, solving technical challenges, and maintaining mission-critical services.

You would join a dedicated mainframe team responsible for calculating all fees across Danske Bank. The system processes millions of transactions and plays a critical role in keeping banking operations stable and reliable.

Although the organisation is gradually modernising its systems, the current mainframe platform is expected to remain an important part of the bank’s infrastructure for many years. The team is therefore looking for someone who is motivated not only by new technologies, but also by engineering ownership, system stability, and long-term maintenance of complex enterprise platforms.

The hiring manager places strong emphasis on mindset, curiosity, and working principles rather than specific technology experience.

Responsibilities

Maintain and improve core fee calculation services running on IBM Mainframe
Investigate incidents, perform root cause analysis, and improve system stability
Work with large-scale enterprise and legacy banking systems
Collaborate with Product Owners and Business Analysts to implement fee calculation logic
Improve testing, operational processes, and documentation
Contribute to long-term system modernisation initiatives where relevant
Work closely with international colleagues across Lithuania, Denmark, and India

You will work with technologies such as: