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Adyen Software Engineer Interview Questions

The questions to prepare for a Adyen Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
ExecutionStart here. 7 questions · ~56 min
Consistency During Network PartitionsHard
Recently asked

Tests distributed systems knowledge for maintaining correctness and availability under partition in payment flows.

distributed systemsdata consistencyAdyen
Caching vs Persistent StorageMedium
Recently asked

Tests ability to reason about performance, consistency, and failure modes under payment-grade concurrency.

Trade-offscachingAdyen
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2
Coding11 questions · ~88 min
Design a Payment ServiceHard
Recently asked

Tests system design and secure API implementation skills for building payment services like Adyen.

authenticationAdyen
Databases and Java CodingMedium

Assesses practical coding skills across SQL and Java.

javaAdyen
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3
SQL & Data Manipulation4 questions + 3 drills · ~62 min
Indexing vs PartitioningMedium

Assesses understanding of database performance and data organization tradeoffs.

indexingdatabaseAdyen
Rank Drivers of Failed PaymentsMedium
Practice
Practice drill

Find the top failure driver in each payment dimension using joins, aggregations, and ranking.

JoinsCase WhenAggregationsAdyenIntuit
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
SQL Average Selling PriceMedium
Practice
Practice drill

Calculate weighted average selling prices by product using a date-range join, aggregation, and NULL handling.

leetcodesqlCostarCostar Group
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4
System Design5 questions · ~40 min
Adyen Formula and ML ArchitectureHard

Assesses your system design thinking and ability to connect ML architecture to Adyen’s approach.

architectureAdyen
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5
Behavioral & Leadership20 questions · ~161 min
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6
More topics3 questions · ~24 min
Thread Safety and SynchronizationMedium

Tests your understanding of concurrency, synchronization, and thread safety in Java.

javaconcurrencyAdyen
Debug Unreachable WarehousesMedium

Assesses your troubleshooting approach for pipeline or data flow failures.

logisticsAdyen
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.