Other roles at Aircall:Product Manager Software Engineer Sales Customer Success Marketing Solutions Architect

How to Pass the Aircall Software Engineer Interview in 2026

Growth · Software Engineer Interview Guide

Applies via Lever Headquartered in France

Interview language: English

The Aircall DNA (TL;DR)

Aircall's "Why Aircall" section highlights ease of use and integration. The interview process assesses candidates' ability to simplify complex telephony solutions, integrate seamlessly with existing tools, and articulate how their contributions directly enhance the user experience for "Small Businesses" using the Call Center product. They look for practical application over theoretical knowledge.

Interviews inRuby JavaScript Go

The Aircall Interview Loop

Your onsite loop will typically consist of 5 rounds.

1
Round 1
Recruiter Screen
Motivation, role fit, logistics.
2
Round 2
Coding Screen
LeetCode-medium algorithmic problems under time pressure.
3
Round 3
System Design
Distributed systems, trade-offs at scale, architecture under constraints.
4
Round 4
Onsite Coding
LeetCode-hard problems, reasoning about defects, code clarity, edge cases.
5
Round 5
Behavioral / Leadership
Past evidence of ownership, influence, resolving conflict.

The Danger Zone: Top Reasons Candidates Fail

Based on our database of Aircall interview outcomes, avoid these common traps:

Proposing a monolithic architecture without considering microservices.
Inconsistent or poorly structured JSON response format.
Designing an endpoint that returns too much or too little data.
Not discussing read/write performance requirements.

Test Yourself: Real Aircall Questions

Three real prompts pulled from our database.

Type · Code Quality

Review the following code snippet [provide a moderately complex, slightly flawed code snippet, e.g., a function processing call data with potential off-by-one errors, unclear variable names, or missing error handling]. Identify potential issues, suggest improvements for clarity, efficiency, and robustness, and refactor it.

Type · Real-time Features

How would you implement a real-time presence indicator for Aircall users (showing who is online, on a call, or away)? Consider the technologies and architecture needed.

Type · Data Structures

Given a list of user call logs (each with a user ID, start time, and end time), write a function to find the user who had the longest total call duration within a given day. Assume call logs can overlap.

+ many more questions, signals, and worked examples

Unlock the Aircall rubric, free

Aircall Interview Question Bank

A sample from our database, grouped by round. Sign up to see the full set.

9 of 14 questions shown

Recruiter Screen

1
Type · Motivation
Why are you interested in Aircall specifically, and what aspects of our mission or product resonate with your career goals as a software engineer?

Coding Screen

2
Type · Data Structures
Given a list of user call logs (each with a user ID, start time, and end time), write a function to find the user who had the longest total call duration within a given day. Assume call logs can overlap.
3
Type · String Manipulation
Aircall's platform handles international numbers. Write a function to validate if a given phone number string is in a plausible E.164 format (e.g., +12125551212). Consider country codes, area codes, and length variations.
+ 1 more questions in this round (sign up to unlock)

System Design

4
Type · Scalability
Aircall needs to handle a surge in concurrent calls during peak business hours. How would you design the backend system to ensure high availability and low latency for call initiation and management?
5
Type · Real-time Features
How would you implement a real-time presence indicator for Aircall users (showing who is online, on a call, or away)? Consider the technologies and architecture needed.
+ 2 more questions in this round (sign up to unlock)

Onsite Coding

6
Type · Debugging
Users are reporting intermittent issues where call recordings are sometimes corrupted or missing. Describe your process for debugging this issue, from initial report to identifying the root cause.
7
Type · Algorithm - Hard
Aircall wants to implement a feature to suggest relevant contacts to users based on their call history and frequency. Design an algorithm to recommend the top N most relevant contacts for a given user, considering factors like call frequency, recency, and duration.
+ 1 more questions in this round (sign up to unlock)

Behavioral / Leadership

8
Type · Conflict Resolution
Our engineering team sometimes balances the need for rapid feature delivery with the technical debt inherent in our telephony stack. Tell me about a time you advocated for a specific architectural trade-off that went against the grain of the immediate product roadmap. How did you align your technical perspective with the product team's delivery goals?
9
Type · Ownership
Aircall relies heavily on third-party CRM integrations that can be unpredictable. Describe a time you identified a recurring failure or performance bottleneck in an external integration that was causing friction for our users. What steps did you take to improve the reliability of that data sync, even if it required you to step into unfamiliar parts of the codebase?
+ 1 more questions in this round (sign up to unlock)

Unlock all 14 Aircall questions, free

No credit card. Every question with its framework, the grading signals interviewers score against, and a worked answer for each.

Unlock all 14 Aircall questions

Interview tracks at Aircall

How Aircall's DNA translates across functions. Pick your role.

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Same DNA, different bar. Browse the closest companies in our database and see how their loops differ.

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Practice Aircall interviews end-to-end

Aircall Mock Interview

Run a live mock interview with our AI interviewer using Aircall-style prompts. Get scored on structure, signal, and answer length - exactly how the real loop grades you.

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STAR Stories for Aircall Behavioral Rounds

Build a Story Bank of your past wins, mapped to the leadership signals Aircall interviewers grade on. Reuse them across every behavioral round.

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Aircall Interview Prep Hub

The frameworks behind every Aircall round: CIRCLES for product sense, hypothesis-driven debugging for analytical, STAR for behavioral. Learn each one in 10 minutes.

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Interview Frameworks

CIRCLES, STAR, AARRR, RICE, MECE. The exact frameworks that make Aircall interviewers nod instead of frown. Step-by-step playbooks with the moves and the pitfalls.

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Sample answers

What a strong answer to these Aircall interview questions shows.

A strong answer shows: Thorough code review skills.; Identification of subtle bugs and design flaws.; Clear and concise explanations of issues.; Ability to write clean, maintainable, and efficient code..

How would you implement a real-time presence indicator for Aircall users (showing who is online, on a call, or away)? Consider the technologies and architecture needed.

A strong answer shows: Understanding of WebSockets or similar real-time communication.; Knowledge of pub/sub patterns.; Consideration for connection management and scalability.; Awareness of potential failure points..

Frequently asked questions

How long does the Aircall interview process take?

Most candidates spend between 4 and 8 weeks from recruiter screen to offer. The onsite loop itself runs in a single day or is split across two half-days, with debrief and offer typically within 5 business days after.

How should I prepare specifically for Aircall?

Focus on three things: (1) the company DNA shown above - what they actually grade for, (2) the rounds in your loop, especially the round most candidates underestimate, and (3) drilling on the question types in this guide using a structured framework like CIRCLES or STAR.

Does this apply to engineering or design roles at Aircall?

The DNA stays the same - what changes is the round mix. SWE candidates face coding screens instead of Product Sense; designers face portfolio reviews and design exercises. The "what they value" and behavioral signals carry across all functions.

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