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Sr Data Engineer Interview Questions

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2,599 sr data engineer interview questions shared by candidates

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.

"They asked me to design an end-to-end data pipeline that supports both batch and real-time processing using tools like Kafka, Spark, and a cloud platform like AWS or Azure. They were particularly interested in how I’d handle schema evolution and ensure data quality at each stage."
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Senior Data Engineer

Interviewed at LexisNexis Legal & Professional

4★
Jul 28, 2025

"They asked me to design an end-to-end data pipeline that supports both batch and real-time processing using tools like Kafka, Spark, and a cloud platform like AWS or Azure. They were particularly interested in how I’d handle schema evolution and ensure data quality at each stage."

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