• 5+ years working on production backend or data-intensive systems
• Recent, substantial hands-on experience writing and operating production software
• Strong Python skills. TypeScript experience is a plus
• Production PostgreSQL experience: multi-tenancy, migrations, and performance optimization
• Deep SQL knowledge and experience with analytical data processing, such as columnar formats or embedded query engines. We use Parquet, Arrow, and DuckDB
• Experience building, extending, and maintaining ETL pipelines across heterogeneous sources, including ERP exports, Excel, and CSV
• Experience setting up and maintaining CI/CD pipelines for reliable production deployments
• The ability to make technical decisions independently and explain the trade-offs
• German at C1 level or above, and fluent English. Team communication is in German; code and documentation are in English
• The right to work in Germany. We do not offer visa sponsorship

You should enjoy turning ambiguous customer needs into clear technical priorities, rather than waiting for fully specified tasks. Priorities can change as we learn from customers; you'll work directly with me to make scope and trade-offs explicit.