Mainframe / COBOL developer

Bankdata

Østjylland

Location
Østjylland
Company
Bankdata
Working hours
Full-time
Posted
21 September 2026
Category
Software developer

About the job

Be part of securing the foundation for Danish finance

Apply now! Would you like to work with systems that must never fail and that are used millions of times every month by both private and business customers?

At Bankdata, our mainframe solutions are central to the daily operation of Danish finance. We are in the midst of a technological transformation where stable operation, high quality and gradual modernization go hand in hand.

Now we are looking for a Mainframe / COBOL Developer who will help further develop and future-proof one of Bankdata’s most business-critical solutions.

Become part of a business-critical team

Purpose

As a Mainframe / COBOL Developer you will become a central part of POW – Mandate Team , which develops and runs a solution that is essential for banks’ daily business. Your role is to ensure stability, quality and further development of the solution – while contributing to modernization and new integration opportunities.

Context

The mandate solution handles more than 80 million API calls per month and is a cornerstone of the banks’ infrastructure. The team works closely with other development teams and subject-matter specialists across Bankdata and continuously balances secure operation and development of new features.

Work environment and culture

You will become part of an agile team with high professionalism, where knowledge sharing, sparring and collaboration are a natural part of everyday life. The tech stack ranges from IBM z/OS, COBOL and DB2 to modern integration and cloud technologies. The culture is characterized by responsibility, trust and a focus on quality in everything we deliver.

Your role – development, operations and modernization

Your contribution

  • As a Mainframe / COBOL Developer, your primary areas of responsibility will be:
  • Development and maintenance of COBOL programs on IBM z/OS
  • Working with DB2, including SQL, performance optimization and data modeling
  • Contributing to technical analyses, design and debugging in complex solutions
  • Ensuring stable operation and high quality in a high-volume platform
  • Close collaboration with colleagues who develop related services on modern technologies

The first 6–12 months you will

  • Gain deep understanding of the mandate solution, the domain and the business-critical processes
  • Take an engaged part in development, maintenance and stable operation of the solution
  • Contribute to modernization initiatives and new integration and event-driven needs
  • Become an integrated part of the team’s collaboration, workflows and culture

Your profile – skills that create stability

We imagine that you

  • Have experience with COBOL and IBM mainframe (z/OS) – DB2 is a plus
  • Work in a structured way and have a careful focus on quality and stability
  • Thrive with complex systems and high business-criticality
  • Are keen to work in a domain with significant impact on Danish finance
  • Contribute with engagement to cooperation, knowledge sharing and a solid team esprit

What do we offer?

  • Work with societally critical solutions that make a real difference
  • A strong professional environment with a focus on quality, stability and development
  • Opportunity to work with both traditional mainframe and modern technologies
  • A culture characterized by collaboration, trust and professional pride

Want to join?

Then send us your CV today via the link below. Start date is as soon as possible, and we process applications on an ongoing basis.

If you have questions about the position, you are welcome to contact Ali Reza Dehdar: [email protected] / +45 93 84 84 70 or Rune Hjertsted Jørgensen: [email protected] / +45 2148 7930

Welcome to Bankdata

Bankdata builds software for the financial sector. We are almost 1000 colleagues on the team, and we develop digital products, platforms and infrastructure that about every third Dane, 200,000 companies and several thousand bank employees use every day.

We believe in structured personal development, a solid collegial community and that ambitious employees with flexible and sustainable working lives perform better. Learn more about working life at Bankdata here.

Business unit Customer Platforms Role Software Development Locations Aarhus

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Mainframe / COBOL developer

Bankdata · Østjylland