Tessian Data Engineer Interview Questions

The questions to prepare for a Tessian Data Engineer interview. Questions from real interview reports rank first. Updated daily.

30questions

~4htotal time

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CodingStart here. 4 questions · ~35 min

Sort intervals by start time, then merge overlapping ranges into a minimal non-overlapping list.

Find Missing Number in RangeMedium

Assesses your approach to efficient problem solving on large datasets.

Algorithms

Tessian

Find Top K Active UsersMedium

Tests data-structure and algorithm skills for top-K computation at scale.

Hash TablesSortingHeap

Tessian

Detect Email Metadata AnomaliesMedium

Tests ability to design anomaly detection logic for streaming email metadata.

Hash TablesGreedyGraphs

Tessian

Pipelines26 questions · ~224 min

Design a spike-resilient AWS data pipeline handling 750K events/sec while preserving low latency, data quality, and replay safety.

Data Quality in ML PipelinesMedium

Approach for maintaining high quality data across ML pipelines, from validation and reproducibility to monitoring and recovery.

monitoringData WranglingQuality

Tessian

Patient Data Quality and PrivacyMedium

Approach for protecting sensitive patient data while maintaining high data quality across an analytics pipeline.

ETLData ModelingQuality

Tessian

Complex ETL Pipeline ArchitectureHard

Explain the architecture of a complex ETL pipeline built from scratch, including orchestration, data quality, idempotency, and backfill strategy.

InfrastructureETLData Modeling

Tessian

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