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Updated weekly · Last refresh Aug 30

DoubleVerify Backend Engineer Interview Questions

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

15questions
~2htotal time
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1
CodingStart here. 7 questions · ~66 min
Implement Binary Search AlgorithmEasy
Practice

Write a binary search function to find a target value in a sorted array.

SearchingDoubleVerify
Analyze Time and Space ComplexityEasy

Explain how to derive time and space complexity for a coding solution and justify the final Big O bounds.

Hash TablesArraysSortingDoubleVerify
Transform Data in CodeMedium

Evaluates your coding skill with data structures, iteration, and transformation logic.

iterationDoubleVerify
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2
System Design6 questions · ~56 min
Balance Consistency and AvailabilityMedium

Assesses trade-offs in distributed systems and how you choose appropriate guarantees.

consistencyavailabilitydesignDoubleVerify
Handle Distributed Service FailuresMedium

Tests reliability engineering practices like retries, timeouts, fallbacks, and resilience patterns.

distributed systemsDoubleVerify
Lead a Technical ArchitectureHard

Assesses ownership, architectural judgment, and how you drive complex technical outcomes.

LeadershiparchitectureDoubleVerify
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3
More topics2 questions · ~19 min
SQL Inner JoinEasy

Assesses your understanding of SQL joins and correct query construction.

JoinssqlDoubleVerify
Data Structures for ConcurrencyMedium

Tests your understanding of performance, correctness, and scalability trade-offs under concurrency.

Trade-offsData StructuresDoubleVerify
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Top Products by Sales RevenueEasy
Practice
Practice drill

Find the top 10 products by total sales revenue using joins, aggregation, and a CTE.

RankingGroup ByAggregationsRTXiSmile TechnologiesCatalina
Top Earners via Table JoinMedium
Practice
Practice drill

Rank Motorola Solutions employees by total earnings using a LEFT JOIN, aggregation, COALESCE, and ROW_NUMBER.

JoinssqlMotorola SolutionsMotorola
The finish line: interview-readyComplete all 15 questions plus 3 hands-on drills to finish this plan.