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Senior Backend Engineer Interview Questions

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2,034 senior backend engineer interview questions shared by candidates

Round 1. Node.js questions on event loop, callbacks, closure, promises, and some other http related questions. Then medium leetcode question - Find longest consecutive string without repeating character. Optimised answer is expected. Round 2 Design twitter. Round 3. Design rate limiter. Result - No contact from them. Interview went really well still haven’t heard from them. All the interviewers were very good, expect the one who took bar raiser. She is arrogant and not open for discussion, for here every problem can be solved by scaling more machines, rather than tackling problem.
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Senior Backend Engineer (Node Js)

Interviewed at Viacom 18

3.7★
Nov 23, 2023

Round 1. Node.js questions on event loop, callbacks, closure, promises, and some other http related questions. Then medium leetcode question - Find longest consecutive string without repeating character. Optimised answer is expected. Round 2 Design twitter. Round 3. Design rate limiter. Result - No contact from them. Interview went really well still haven’t heard from them. All the interviewers were very good, expect the one who took bar raiser. She is arrogant and not open for discussion, for here every problem can be solved by scaling more machines, rather than tackling problem.

You are a developer who accidently went back in time. You can’t return back to your timeline because you Time machine need to sort array from 10 Gigabytes of unsorted integer data. The problem in front of you is Machine during that time was not that advanced. You find a device with 1 gigs of ram and 240 Gigabyte of hard drive. They are all integers [0,65,535] like 10,5,98,32,22,87,5,6,9 etc. Same integer values can be repeatedly appearing in the file. Create a function to read 10 gigabytes of data and sort it. (Pseudo code and logic will also work)
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Senior Backend Engineer

Interviewed at Tech Alchemy

3.8★
Sep 15, 2021

You are a developer who accidently went back in time. You can’t return back to your timeline because you Time machine need to sort array from 10 Gigabytes of unsorted integer data. The problem in front of you is Machine during that time was not that advanced. You find a device with 1 gigs of ram and 240 Gigabyte of hard drive. They are all integers [0,65,535] like 10,5,98,32,22,87,5,6,9 etc. Same integer values can be repeatedly appearing in the file. Create a function to read 10 gigabytes of data and sort it. (Pseudo code and logic will also work)

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