Oracle APEX- and Data Warehouse Developer (m/w/d) (Ref.Nr.: 46895)

We are looking for an Oracle / APEX developer to provide technical support and further development of an Oracle data warehouse as well as an Oracle Application Express (APEX) application. The focus of the role lies on stable IT operations, creating technical concepts, and implementing ETL processes in a complex data processing environment.

Key Facts
Start: 08.06.2026
Duration: Not known
Utilization: 100 %
Deployment type:
Deployment location: Mainz
Country of deployment: Germany

Your Tasks
•Ensure the IT technical operation of the application (including error analysis, delivery of hotfixes, and user support)
•Independent implementation of the entire patch management process
•Create concepts based on the professional coordination with the various departmental requirements
•Define the necessary adjustments to the system architecture and documentation (data flow diagrams, system pictures) in the system documentation and online systems of the client
•Translate the professional requirements and expanded system architecture into technical concepts
•Adjust and document the technical components based on the used technologies under compliance with the given standards
•Development of prototypes and implementation of ETL processes
•Create test concepts, conduct and document tests
•Create, conduct, and document performance tests

Mandatory Requirements
•At least 5 years of practical experience in the CV with very good knowledge of SQL and data warehouse concepts and technologies, with a focus on Oracle SQL and Microsoft SQL Server
•At least 3 years of proven experience in creating Data Vault data models
•At least 5 years of practical experience in the CV with very good knowledge and extensive project experience with Oracle Application Express (versions 18.2, 22.2, and 24.1) in the areas of development, installation, configuration, administration, and maintenance
•Very good knowledge and at least 5 years of practical experience in programming with JavaScript and CSS

Desirable Requirements
•Good knowledge and at least 3 years of proven project experience with the Oracle Data Integrator (version 12) in the areas of development, installation, configuration, administration, and maintenance
•At least 3 years of proven experience and good knowledge in administering and using version control systems such as Subversion and Git with the corresponding tools like Tortoise and Ankhsvn
•Knowledge in the areas of configuration, administration, and development in PowerBI, evidenced by at least 3 years of proven experience
•Knowledge in the areas of configuration, administration, and development in APEX, evidenced by at least 3 years of proven experience
•Fluent German skills and good English skills

Further Information
The performance delivery takes place onshore in Germany.

Let’s power the future together
From business case to implementation: As a leading consulting firm for strategic transformations, we are a trustworthy partner for our clients - and for our employees. Responsible, high-performance, and always with people at the forefront. #WeAreWavestone
With our 360° portfolio of consulting services, we combine excellent industry expertise with a broad range of cross-industry competencies, work interdisciplinary, and think beyond the horizon. Our partner companies and freelancers: Freelancers can offer us comprehensive perspectives within our own projects and support as long-term framework partners for filling project vacancies - quickly and directly.

We look forward to your contact!

Your direct point of contact at Wavestone
Selma Halilovic
Phone: 00498945599290
Email: Find more English-speaking jobs in Germany on Arbeitnow