Mainframe Business Expert, German

Commerzbank Digital Technology Centre Poland

Business Expert involved in data source analysis and product development for Commerzbank's PC-RB Datamart. Supporting the evolution and maintenance of business data systems in a hybrid role.

Posted 6/29/2026full-timeŁódź • 🇵🇱 PolandMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

CloudGoogle Cloud PlatformSQL

About the role

Key responsibilities & impact

Clarification and analysis of requirements for our products
Creation of (technical) designs and specifications, data modeling, DB2 table design, and delivery agreements based on technical requirements
Further development and maintenance of the data model
Business and technical data analysis
Support and quality assurance during the development process, including testing through to go-live
Processing of requests for the PC-RB Datamart and CODABAS, including data evaluation
Advising and supporting our stakeholders

Requirements

What you’ll need

German: B2+ level
English: B2/C1 level
Strong analytical skills
Advanced SQL knowledge
Good knowledge of z/OS and DB2
Good knowledge of COBOL programs
Proficiency in Excel (nice to have)
Basic knowledge of data modeling fundamentals (nice to have)
Familiarity with data warehousing/data lake concepts (nice to have)
Experience with cloud solutions (preferably GCP) (nice to have)
Experience in the banking sector (nice to have)
Basic knowledge of Rumba, DB2 Catalog Manager, PowerDesigner, Aqua Data Studio (nice to have)

Benefits

Comp & perks

Development plans for employees
Life insurance
Flexible working hours
Team integration events
Training and professional development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

SQLData ModelingDB2COBOLData Analysis

Soft Skills

Analytical SkillsAdvising Stakeholders