Zalando Data Engineer Interview Questions
The questions to prepare for a Zalando Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Flatten nested JSON into dot-path rows, expanding arrays with Cartesian-product semantics using recursion.
Assesses readiness across multiple languages and problem-solving under time pressure.
Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.
Evaluates orchestration skills and SQL workflow design.
Evaluates system design thinking for SQL-based data engineering work.
Calculate each user's running order total over time using a window function.
Bayer
Sparksoft
Western DigitalIdentify department maximum salaries, rank ties, and count assigned projects using PostgreSQL joins and window functions.
IBMTransform comma-separated employee tags, join employees to managers, and aggregate active direct reports by manager and tag.
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Compare batch and streaming data processing, including when each fits best in a pipeline.
Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.
Approach for maintaining data quality and integrity across ETL pipelines.