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Updated weekly · Last refresh Oct 17

Zapier Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 10 questions · ~87 min
Reverse String In PlaceEasy
Practice

Reverse a string using a two-pointer approach by converting it to a mutable character list in Python.

CodingStringsProgrammingZapier
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2
Execution14 questions · ~121 min
Manage Technical Debt DeliberatelyMedium

Explain how you would prioritize and execute technical debt work without losing stakeholder alignment or delivery momentum.

Trade-offsRisk AssessmentScope ManagementZapier
Prioritize Debt vs Feature DeliveryMedium

Explain how you would balance technical debt work against new feature delivery without losing roadmap credibility or increasing risk.

Trade-offsRoadmappingPrioritizationZapier
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3
Security & Infrastructure4 questions · ~35 min
Indicators of a Good APIHard

Identify measurable indicators of a good API, covering security, consistency, reliability, operability, and developer usability.

authenticationhttpapiZapier
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4
System Design7 questions · ~61 min
Design Billing System With API and CLIHard

Evaluates system design skills, API/CLI integration, and prioritization under constraints.

apiPrioritizationZapier
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5
Behavioral & Leadership12 questions · ~104 min
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6
More topics3 questions · ~26 min
Software Design PrinciplesEasy

Tests your approach to maintainability, extensibility, and sound engineering practices.

CommunicationOwnershipZapier
Test and Debug Intermittent Production FailuresMedium

Tests debugging methodology, observability use, and ability to handle flaky production issues.

CommunicationOwnershipDealing With AmbiguityZapier
Database Schema DesignMedium

Tests data modeling, constraints, and scalability considerations.

JoinsData WranglingGroup ByZapier
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Optimize a Slow SQL QueryHard
Practice
Recently asked
Practice drill

Rewrite a slow PostgreSQL loan payment query to reduce scanned rows while preserving the required aggregated results.

database optimizationJoinsData WranglingAmeripriseEEltro Cyberchrome PrivateEnergyHub
Segments by Tasks Per LoginMedium
Practice
Practice drill

Compare task executions per login across user segments and return the segment or segments with the highest ratio.

JoinsRankingGroup ByZapier
DAU with Three Tasks in 24 HoursMedium
Practice
Practice drill

Identify users completing at least three successful automated tasks within a rolling 24-hour window for each active date.

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