Senior Front End Engineer Interview Questions

688 senior front end engineer interview questions shared by candidates

1. How to remove duplicates from an array without using an extra object or creating a new Set. 2. How to implement the flatten method on your own. 3. Why did React move from Class based components to Functional based components ?
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Senior/Principal Front-end Engineer

Interviewed at ConnectWise

3
Nov 28, 2022

1. How to remove duplicates from an array without using an extra object or creating a new Set. 2. How to implement the flatten method on your own. 3. Why did React move from Class based components to Functional based components ?

1 take home - 3 hours to complete, parsing some data and posting response to an endpoint 3 technicals - 1 vanilla Javascript, 1 systems design, 1 algorithms easy Leetcode 1 behavioral with hiring manager - basic behavioral questions but expected you to go into more technical detail
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Senior Front End Engineer

Interviewed at HubSpot

3.4
Mar 27, 2025

1 take home - 3 hours to complete, parsing some data and posting response to an endpoint 3 technicals - 1 vanilla Javascript, 1 systems design, 1 algorithms easy Leetcode 1 behavioral with hiring manager - basic behavioral questions but expected you to go into more technical detail

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