About Gültekin
Turkish
Native or bilingual
German
Fluent
English
Fluent
Experience
- Baader Bank AGSenior Manager | Reporting & Data ManagementApril 2025 - Today (1 year and 2 months)• o Responsibility for the migration of the existing Oracle/Jaspersoft reporting landscape to a modern Snowflake-Tableau platform• o Active participation in the phased modernization of Oracle-based data pipelines towards a cloud-based Snowflake architecture• o Analysis and adaptation of existing Oracle-SQL/PLSQL components during the migration to ensure stable parallel operation during the migration• o Conception of the target architecture and data models in Snowflake as well as creation of reusable views, semantic layers, and performant data structures for reporting and ad-hoc analyses• o Ensuring parallel operation: stable continuation of the existing Oracle/Jaspersoft report pipelines while new Tableau dashboards are created and put into production• o Close collaboration with business departments to prioritize reports to be migrated, harmonize KPIs, and coordinate layouts• o Automation, monitoring, and performance optimization of daily report runs (cron jobs/batch jobs) including error analysis and stabilization• o First wave of the most important management reports successfully migrated to Snowflake/Tableau, thereby increasing transparency and self-service options for business departments• o 2nd-level support, incident analysis, and troubleshooting for reporting applications (Jaspersoft/MicroStrategy/Tableau)• o Application operation, authorization management, deployment coordination, and communication with external software partners
- CBR Fashion GroupApplication ManagerOctober 2024 - April 2025 (6 months)• o Technical support and further development of several DWH and BI applications in the wholesale landscape• o Consulting for business departments on reporting, DWH, and analytics topics• o Implementation of new analytical applications and interface adjustments in the BI environment• o Creation of system and process documentation as well as ad-hoc analyses
- CBR Fashion GroupApplication Manager | Business Intelligence SolutionsOctober 2024 - April 2025 (6 months)• Responsible for the technical maintenance and further development of several DWH, BI, and analytical applications for the wholesale landscape• Consulting business departments and user support for the systems in use and their utilization• Development and support of supplementary applications as well as new analytical applications for the BI and analytics landscape• Customizing customer-specific interfaces and adjustments to the DWH and BI system• Creation of system and process documentation as well as evaluations and ad-hoc reports• Participation in IT projects
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Education
- Certificates - IBM Certified Developer2009Zertifikate - IBM Certified Developer
- Cognos 8 BI OLAP DeveloperCognos 8 BI OLAP Developer