Data Platform Engineer with German (Microsoft SQL Server & BI)

Who We Are We are looking for an experienced Data Platform Engineer with German (Microsoft SQL Server & BI) to join a large-scale telecommunications environment and support the existing RepSaS data landscape. The role has a strong focus on legacy support, operational stability, troubleshooting, and the controlled retirement of existing databases and data solutions. The successful candidate will work with long-established Microsoft SQL Server and BI environments, supporting the analysis, maintenance, consolidation, migration, and decommissioning of databases, ETL pipelines, interfaces, reports, and semantic models. The successful candidate will work closely with Product Owners, Solution Design, Operations, business stakeholders, and adjacent data and platform teams to ensure stable operations while progressively reducing legacy dependencies. This is a senior hands-on engineering position requiring strong expertise in Microsoft SQL Server, T-SQL, SSIS, SSAS Tabular Models, and Power BI, as well as the ability to understand complex legacy environments with limited documentation and take technical ownership of operational and retirement activities. What You'll Be Doing Analyze and resolve production incidents, technical issues, and data quality problems within existing RepSaS solutions Troubleshoot and maintain T-SQL code, Stored Procedures, Views, Functions, SQL Agent Jobs, and ETL pipelines Analyze and optimize SQL queries, database objects, execution plans, indexes, loading processes, and overall database performance Maintain, stabilize, and selectively refactor long-established database and reporting logic Monitor production environments, perform root-cause analysis, and document bug fixes and workarounds Perform technical assessments of existing databases and identify users, dependencies, data flows, interfaces, loading jobs, reports, and semantic models Evaluate which database objects and solutions should be maintained, migrated, consolidated, archived, or retired Prepare and support controlled database decommissioning activities, including technical checks, documentation, and rollback options Support data and logic migrations from RepSaS into agreed target environments Maintain and troubleshoot existing Power BI reports and datasets Maintain and optimize SSAS Tabular Models, including relationships, measures, processing, and DAX logic Validate KPIs, data quality, and functional and technical consistency across reporting solutions Analyze report and data dependencies to support migration and retirement decisions Document data flows, database objects, interfaces, dependencies, and retirement activities Ensure technical knowledge is captured and transferred within the team, particularly for legacy components with limited documentation What You'll Bring Along Several years of hands-on experience developing and supporting Microsoft SQL Server and BI solutions Expert-level…