Airbnb Software Engineer

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The role of an Airbnb Software Engineer

Airbnb is an American company that operates an online marketplace for lodging, primarily homestays for vacation rentals, and tourism activities.

Airbnb software engineers build scalable apps and software to enhance user experience for its broad range of tourism-related online services.

Role and responsibility

  • Build frontend/backend services and APIs to create scalable engineering systems
  • Work with data scientists, business analysts and operations to define, capture, and use real-time event data for business insights and product features
  • Collaborate with infrastructure engineering teams to participate in, validate, and evolve how Airbnb builds, tests, and deploys code in a distributed Service-Oriented Architecture
  • Alter existing and develop new data access and protection patterns to ensure your community's personal data is safe and secure

Skills/Qualifications required

  • 4+ years of industry experience
  • Backend or Full-Stack experience in a work-setting or classroom-setting.
  • Work experience, open-source code, or coursework in any of the following languages: C/C++, Java, C#, Python/Django, Ruby/Ruby on Rails
  • Evidence of exposure to architectural patterns of a large, high-scale web application (e.g. well-designed APIs, high volume data pipelines, efficient algorithms).
  • Understanding of data structures and problem solving approaches, and ability to articulate trade offs
  • Passion for creating highly effective technology platform for our growing global workforce
  • Experience with Agile development
  • Be future looking; we might be focused on immediate regulations, but need to build for the long term
  • Comfortable with tackling ambiguous problems and unblocking yourself
  • Focus on building high quality products; every one of our flows affects the business bottom line
  • Data-driven in how you solve problems and validate you've solved them correctly
  • Have a strong desire to mentor the careers and development of other engineers
  • Possesses strong verbal and written communication skills.
  • BS in Computer Science / MIS or equivalent work-related experience

Airbnb Software Engineer Salary

  • Entry-level salary: USD 105,000.
  • Senior positions: USD 257,000. 
  • Median salary: USD 165,000 with the base component being USD 120,000, stock component being USD 30,000 and bonus being USD 15,000.

Interview Guide

Interview Process Overview

Usually, the interview process for the   Software engineer role at Airbnb consists of 4 rounds as under:

  • Hacker Rank Online test
  • Recruiter Screen
  • Phone Screen
  • Onsite Round 

Hacker Rank online test

Overview

It's an online test candidates have to get through to qualify for the interview rounds. There will be 3 coding questions to be answered within 120 minutes. The difficulty level of the questions is generally medium.

Recruiter Screen

Overview

On clearing the Hacker Rank test, candidates will get a call for the recruiter screen, which is a 45-minute telephonic interview with the hiring manager. Here, the interviewer is going to assess whether your experience and skill sets are a good match for the job you’ve applied for. Most of the questions are going to be based on your previous experience/resume. Hence, you should prioritize preparing your resume well over any other thing for this round. Some questions regarding your motivation for the role and company might also be asked. So, prepare some good points for these questions beforehand, especially the expected "Why Airbnb?" or "Why a career in software engineering?"

Phone Screen

Overview

Once you have cleared the Recruiter Screen, you will proceed to the Phone Screen. The phone screen is a telephonic interview round with an Airbnb Software engineer. This interview will last for about 1 hour. The phone Screen is designed to test your technical skills Questions in this round are going to be theoretical, conceptual, and will also involve some coding through a shared online editor.

 Here are a couple of important topics from which questions are asked in this round:

  • Coding
  • System Design

Interview Questions

Most asked questions in the Phone Screen

Coding

  • Suppose you are given an array of distinct integer candidates and a target integer "target", write a function to return a list of all unique combinations of candidates where the chosen numbers add up to target in these algorithms.
  • Write a function to find the number of ways in which you can move N meters by doing jumps of 1, 2, 3, 4, or 5-meter lengths. Assume that N can be a very large number. 
  • Write a function to find the first repeated character from a given string.

System Design

  • Given x, y, z : how would you design the infrastructure for a real-world chatbot system?
  • Design a cache system to store data locally and flush it after the overflow.
  • Design a Banking System having different products, two of which are the savings and current account. The system should be able to add a customer, create an account and debit/credit into the account
  • Design an online voting system app.

Practice more such questions with an Airbnb Software Engineer

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Onsite Round

Overview

The onsite interview round for the Airbnb Software engineer role is a more in-depth version of the technical phone screen. It takes place at one of Airbnb's campuses. The interview panel consists of 4-6 interviewers who are software engineers, product managers, and HR managers at Airbnb.  The onsite round consists of 3 interviews.

The first two interviews are technical while the third3rd and last one is a behavioral interview.

Technical Interviews

The two Technical interviews focus on testing the coding and system design abilities of the candidate. Each of these interviews is conducted an hour-long and is conducted by a senior software engineer at Airbnb.

Behavioral interview

It's the final interview of the onsite round. The behavioral interview is 1-hour long and is conducted by senior managers from Airbnb. This interview mainly aims to test a candidate's motivation for the role, leadership skills, and how good a fit they will be in the company. Questions in this interview are mostly situation-based.

Tips

  • An overwhelming focus is going to be on coding. So, candidates must practice well to ace the coding round.
  • Focus on scenario-based system design questions.
  • Do not rush to answer, and take your time.
  • Do not hesitate to ask clarifying questions.
  • Follow the think-out-loud approach for answering open-ended questions.

Interview Questions

Most asked questions in the technical interviews (Onsite Round)

Coding

  • Write a code to reverse a linked list.
  • Write a code to find the smallest number, greater than a given number p, which does not have '11' in its binary representation.
  • Write a function to print the mirror of a binary tree.
  • Write a program to concatenate the reverse of two given strings.
  • Write a function to replace each element in an array with its rank.

System Design

  • Design a low-level payment app such as Paytm.
  • Design the back-end of a ride-sharing service app such  service such as Uber
  • What do you understand about High Availability Design?

Most asked questions in the Behavioral interview:

  • What Airbnb values appeal to you the most?
  • Is there anything about the work culture at Airbnb that you would want to change?
  • Why do you want to pursue software engineering as a career?
  • How do you deal with failures?

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