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Updated weekly · Last refresh Sep 22

Aircall Software Engineer Interview Questions

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

47questions
~8htotal time
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1
CodingStart here. 14 questions · ~139 min
Coding: Max Entries by IDMedium
Practice

Count entries per ID with a hash map and return the first ID tied for the maximum count.

aggregationArraysArray ManipulationAircall
Two Sum with TargetEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsAircall
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2
System Design10 questions · ~99 min
Design a Real-Time Chat RankerHard

Design the ML system behind a real-time chat app, including message ranking, retrieval, serving, and feedback loops.

InfrastructureRetrievalAircall
Hexagonal Architecture PrinciplesMedium

Evaluates understanding of hexagonal architecture and its practical application.

Aircall
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3
Execution3 questions · ~30 min
Improve System Performance and ReliabilityEasy

Explain how you would optimize a system for performance, reliability, and user experience while making clear trade-offs and defining success.

Trade-offsSuccess CriteriaRisk AssessmentAircall
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4
Behavioral & Leadership17 questions · ~169 min
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5
More topics3 questions · ~30 min
Do You Know Node.jsEasy

Assesses relevant technical experience for the role.

experiencenode.jsAircall
Immediate Actions for OutageHard

Tests your incident response discipline, prioritization, and ability to restore service safely.

InfrastructureRisk AssessmentQualityAircall
Handling Missing ValuesMedium

Tests your judgment on imputation, exclusion, and impact on analysis outcomes.

Data WranglingAggregationsQualityAircall
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Time-to-Conversion SQL by ChannelMedium
Practice
Practice drill

Task Aircall's marketing team wants to compare how quickly leads from LinkedIn and Google Ads convert. Assume the query runs on 2026-08-29, and define the...

Date FunctionsJoinsAggregationsAircall
SQL for Power UsersMedium
Practice
Practice drill

Aggregate Aircall calls and distinct integrations to identify users meeting both power-user thresholds.

JoinsData AnalysisGroup ByAircall
Rolling 7-Day Dropped CallsMedium
Practice
Practice drill

Calculate each Aircall agent's seven-day rolling average of dropped calls, including calendar days with zero dropped calls.

Window Functionsmissing valuesDate FunctionsAircall
The finish line: interview-readyComplete all 47 questions plus 3 hands-on drills to finish this plan.