December 19, 2025

IBMi Application Operations Expert

Senior • Hybrid

$21,000 - $25,199/

Warsaw, Poland , +3

Salary: 1000 - 1200 PLN/day on B2B

Work model: hybrid from Gdynia / Gdańsk / Warszawa / Łódź (2/3 days per week from the office)

 

Why choose this offer?

  • You can expect a flexible work organization
  • The international work environment will give you the opportunity to interact with the English language on a daily basis
  • Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
  • The Jit community will bring you a nice time during regular integration meetings

 

Project

The project is focused on modernizing and evolving core banking and payment systems built on the IBMi/AS400 platform within a large-scale banking environment. It supports long-term transformation initiatives aimed at improving system stability, integration capabilities, and overall operational efficiency of critical banking services.

 

Responsibilities you'll have

  • Perform development on IU IT systems (core banking, payment engines) for strategic initiatives, major upgrades and migrations
  • Perform unit and functional testing for internal/vendor applications software updates (hotfixes, upgrade)
  • Collaborate with business, application maintenance and other technology areas to deliver on the backlog and move toward the strategic target picture for the environment
  • Write and maintain code in Cobol, RPG
  • Integrate IU systems with related technologies (LMI)
  • Contribute to creation of detailed design, architecture for major upgrades and migrations
  • Document business and functional requirements, including data flow, business rules, and use cases/ stories
  • Participate in all aspects of SDLC (analysis, design, coding, testing and implementation)
  • Improve delivery pipelines and reducing technical debt
  • Provide L2 and L3 support for incidents and problems

 

Expected competences and knowledge

  • 10+ years of experience with IBMi/AS 400 / Cobol (Application Development and support)
  • Ability to document, present and implement new integrations
  • Ability to set high standards in the area, contribute to creation of detailed design
  • Excellent communication and coordination skills
  • Experience working with different vendors and vendor systems
  • ITIL certification
  • RPG experience is considered a big plus

 

Nice-to-have knowledge and experience

  • Mainframe development
  • Development experience - Java, .Net,
  • Monitoring tool like Grafana
  • Logging exploration - Splunk
  • DB experience - DB2

 

Technologies you'll work with

  • IBMi / AS400 platform
  • Cobol
  • RPG
  • DB2
  • Core banking and payment systems
  • System integrations (LMI and related technologies)
  • CI/CD and delivery pipelines
  • Monitoring and logging tools (e.g. Grafana, Splunk)
  • ITSM / ITIL-based processes

 

Client – why choose this particular client from the Jit portfolio?

Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language. 

 

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.