PostgreSQL Developer / Database Migration Specialist (f/m/d) – Security

Shape the future of secure IT systems Join Data-Warehouse GmbH and work on high-security, mission-critical projects at the forefront of modern technology. As part of an experienced international team, you will contribute to systems where security, reliability, data quality, and technical precision truly matter. We are looking for multiple experienced PostgreSQL Developers / Database Migration Specialists (f/m/d) to support a major migration project from SAP HANA to PostgreSQL.
Aufgaben

Your main responsibilities will include:

• Analyze existing SAP HANA database structures, views, procedures, and SQLScript logic
• Design and implement PostgreSQL schemas, tables, views, functions, and stored procedures
• Support the migration of database logic from SAP HANA / SQLScript to PostgreSQL / PL/pgSQL
• Develop and test migration scripts, data transformation logic, and validation routines
• Optimize SQL queries, indexes, and PostgreSQL database performance
• Document technical decisions and migration steps clearly and reliably
  

Profil

You should bring solid experience in database development and migration projects, especially in several of the following areas:

• Strong SQL and PostgreSQL experience
• PL/pgSQL, stored procedures, functions, triggers, or comparable database-side programming
• Database design, data modeling, schema development, and performance tuning
• Data migration, ETL, transformation logic, and data validation
• Linux-based environments and Git or comparable version control systems
• Experience with reporting solutions, preferably based on open-source tools

  A strong plus would be experience with:

• SAP HANA, SAP HANA SQL, SQLScript, calculation views, or generated SAP HANA views
• Migration from SAP HANA, Oracle, SQL Server, DB2, or other enterprise databases to PostgreSQL
• Proxmox or virtualized infrastructure environments
• High-security, regulated, public-sector, aerospace, defense, or mission-critical IT environments
• We are looking for experienced database professionals who understand that migration is not only about moving data, but also about preserving logic, performance, reliability, and business-critical functionality.

  You are a good fit if you:

• Have a strong database engineering mindset
• Can analyze complex source systems and translate them into robust PostgreSQL solutions
• Work carefully, independently, and with a strong sense of responsibility
• Communicate clearly with technical stakeholders
• Are willing to work on-site due to project security requirements
• Are eligible to work in a high-security project environment

  Important notice!

• Due to the sensitive nature of the project, candidates must have citizenship of an EU or NATO member state and must hold a German extended security clearance Ü2.
• Further, due to the sensitive nature of the projects and the compliance requirements of the stakeholders, working from home is not an option.
  

Wir bieten

• Competitive salary
• Permanent employment in a stable, growing company
• Work on high-impact security projects
• Individual training and development, including German courses
• Career growth opportunities
• Relocation support
• Sports & fitness benefits, including company football every two weeks
• A professional environment where quality, reliability, and trust matter
  

Important note
Please be advised that a valid work permit for Germany is required for non-EU citizens. Unfortunately, applications without a valid work permit and sufficient German language skills may not be considered.

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