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Updated weekly · Last refresh Oct 17

Zendesk Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 24 questions · ~244 min
Library Sorting and CheckoutEasy
Practice

Sort books by title or author and process checkout requests efficiently using sorting and a hash map.

SortingZendesk
String ReversalEasy
Practice

Reverse the order of words in a string while removing extra whitespace using splitting and two-pointer reversal.

string manipulationArray ManipulationAlgorithmsZendesk
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2
System Design5 questions · ~51 min
Messaging API App and Zendesk-Like DesignHard

Evaluates system design skills and integration thinking for Zendesk-like workflows.

system designZendesk
Basic Systems Design and CodingMedium

Tests fundamentals of system design and coding practices for production-ready software.

system designCodingZendesk
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3
Technical Fundamentals4 questions · ~41 min
React Popularity and TradeoffsEasy

Evaluates your knowledge of React fundamentals and why teams adopt it.

reactZendesk
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4
Pipelines4 questions · ~41 min
Local Browser RAG SystemMedium

Assesses applied ML/AI engineering skills for retrieval-augmented generation.

Zendesk
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5
Execution6 questions · ~61 min
Approach Code ReviewsMedium

Tests your review criteria, collaboration style, and ability to improve code quality.

code reviewscollaborationZendesk
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6
Behavioral & Leadership6 questions · ~61 min
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7
More topics1 question · ~10 min
Optimize a Slow SQL QueryHard

Tests advanced SQL tuning and ability to improve performance while preserving results.

SubqueriesJoinsCTEsZendesk
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Indexing and Query PerformanceMedium
Practice
Practice drill

Write a selective PostgreSQL ticket query and explain how indexing can improve its filtering and sorting performance.

database optimizationJoinsData WranglingZendeskFactored
SQL First-Touch AttributionMedium
Practice
Practice drill

Use joins and ROW_NUMBER to identify the earliest qualifying Zendesk campaign touch for each converted user.

Window Functionsdata relationshipsattributionZendesk
Snowflake and dbt ExperienceMedium
Practice
Practice drill

Return the latest dbt run status for every active model, including models that have never run.

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