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A: They asked me to walk through a real-world Spark use case I’d implemented—building a streaming ETL for clickstream data—detailing how I managed stateful windowed aggregations, tuned `spark.sql.shuffle.partitions`, and fixed data skew with a custom partitioner.
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Senior Data Engineer

Interviewed at Nubank

4.4★
Apr 25, 2025

A: They asked me to walk through a real-world Spark use case I’d implemented—building a streaming ETL for clickstream data—detailing how I managed stateful windowed aggregations, tuned `spark.sql.shuffle.partitions`, and fixed data skew with a custom partitioner.

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