Backend Developer Interview Questions

9,192 backend developer interview questions shared by candidates

Round 1: Write a Node.js application that provides RESTful GET, POST, PUT, and DELETE APIs to perform CRUD operations on a MongoDB database, handling requests/responses in JSON with proper status codes. Duration of interview - 30 min
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Backend Developer(Node.js)

Interviewed at SolarSquare Energy Pvt Ltd

3.7
Sep 18, 2025

Round 1: Write a Node.js application that provides RESTful GET, POST, PUT, and DELETE APIs to perform CRUD operations on a MongoDB database, handling requests/responses in JSON with proper status codes. Duration of interview - 30 min

In the first interview, the common HR stuff. The exercise was proposing a refactoring to improve the design of a example codebase. This had to be defended with some of their enginneer explaining your reasons and weighting their points and proposals. The last two was common human oriented stuff again.
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Backend Developer

Interviewed at Idealista.com

4
Sep 20, 2023

In the first interview, the common HR stuff. The exercise was proposing a refactoring to improve the design of a example codebase. This had to be defended with some of their enginneer explaining your reasons and weighting their points and proposals. The last two was common human oriented stuff again.

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