Backend Engineer Interview Questions

Showing 1–4 of 4 results

• AirwallexMedium·Backend Engineer
  AI-Assisted Build: Tic-Tac-Toe Logic Grown Into a Frontend and Backend App

  An AI-assisted coding exercise: build a two-player Tic-Tac-Toe game, then grow it into an application with a frontend and a backend while using AI tools. Tests correct game rules, server-side validation, API design, and the ability to understand, debug and verify AI-generated code.

  Software Engineering FundamentalsOther
• AirwallexMedium·Backend Engineer
  Design a Hotel Booking Platform Down to the SQL Tables and Booking Transaction

  Design a hotel booking platform where travelers search by destination and dates and book rooms, down to the SQL tables and the booking transaction. Tests schema design with real constraints, preventing double booking under concurrency, payment holds and expiry, and a search path that scales separately.

  System DesignOther
• AirwallexMedium·Backend Engineer
  Maximum Triangle Path Sum, Overall and Through a Required Cell

  Given an integer triangle where each step moves to one of the two adjacent cells in the next row, return the maximum top-to-bottom path sum and the maximum sum among paths forced through a given cell. Tests dynamic programming on a triangle and adapting it to a constrained follow-up.

  Coding & AlgorithmsOther
• SpotifyMedium·Backend Engineer
  Staying Productive When Project Requirements Were Unclear or Kept Changing

  A Spotify behavioral question about a project with unclear or constantly changing requirements, asking how you adapted and stayed productive. It tests how you reduce ambiguity, structure work to absorb change, communicate the cost of churn, and reflect on the outcome.

  Behavioral & LeadershipOther