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Kraken Digital Asset Exchange Data Engineer Interview Questions

The questions to prepare for a Kraken Digital Asset Exchange Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~56 min
Top 10 Products SQL QueryEasy
Practice

Task Artefact's commerce analytics team needs a monthly view of its strongest-selling products. Write a PostgreSQL query using the productsales table to fi...

sqlKraken Digital Asset Exchange
SQL vs NoSQL for Go-to-Market DataEasy

Explain how SQL and NoSQL differ in schema, consistency, scaling, and Demandbase-style analytics use cases.

JoinsData WranglingKraken Digital Asset Exchange
Database Query Performance OptimizationHard

Assesses your ability to improve query performance using indexing, query plans, and rewrites.

Joinsindexesquery optimizationKraken Digital Asset Exchange
DAU and Week-over-Week GrowthMedium
Practice
Practice drill

Calculate daily active traders for a Kraken pair and compare each day with the same weekday from the prior week.

Window FunctionsDate FunctionsJoinsKraken Digital Asset Exchange
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
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2
Pipelines15 questions · ~136 min
Integrating Multiple Data SourcesEasy

Common pipeline issues when combining multiple data sources, including schema mismatch, data quality, orchestration, and duplicate handling.

ETLData ModelingQualityKraken Digital Asset Exchange
Optimize a Pipeline BottleneckMedium

Explain how you identified and fixed a bottleneck in a data pipeline while preserving correctness and operational visibility.

data processingperformancebottleneck optimizationKraken Digital Asset Exchange
Data Modeling Tools and ArchitectureEasy

Preferred tools and patterns for data modeling and pipeline architecture in a modern data platform.

InfrastructureToolsData ModelingKraken Digital Asset Exchange
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3
Behavioral & Leadership7 questions · ~63 min
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4
More topics2 questions · ~18 min
Python Record DeduplicationEasy
Practice

Remove duplicate Bloom Energy telemetry records by record ID while preserving the first occurrence and original order.

Hash TablesArraysStringsKraken Digital Asset Exchange
JSON to CSV TransformationEasy

Tests ability to implement practical data transformation logic from JSON to CSV.

Hash TablesArraysStringsKraken Digital Asset Exchange

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The finish line: interview-readyComplete all 28 questions plus 2 hands-on drills to finish this plan.