Front End Software Engineer Interview Questions

801 front end software engineer interview questions shared by candidates

In the detailed review of my code I spoke a lot about how I balanced using React and Next.js best practices against less conventional and even old-fashioned low level coding techniques. I was asked how I might balance my "old school" ways of doing some things against the "new school" ways done by the dev team.
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Senior Front-End Software Engineer (Remote)

Interviewed at Bask Health

3.8
Jun 3, 2025

In the detailed review of my code I spoke a lot about how I balanced using React and Next.js best practices against less conventional and even old-fashioned low level coding techniques. I was asked how I might balance my "old school" ways of doing some things against the "new school" ways done by the dev team.

Engineer phone screen questions: 1.) What is a closure? 2.) What's the right way to share data between controllers/directives? 3.) What is the dot notation? In person whiteboard questions: 1.) Say you had an array of objects with 3 keys(name, apr and max_credit) how would you sort the array by apr in ASC order. 2.) Say you had the same array of objects how would you find the objects that apr are within a range? 3.) How would you check if a string is a palindrome manually?
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Software Engineer - Front End

Interviewed at LendingTree

3.9
May 4, 2017

Engineer phone screen questions: 1.) What is a closure? 2.) What's the right way to share data between controllers/directives? 3.) What is the dot notation? In person whiteboard questions: 1.) Say you had an array of objects with 3 keys(name, apr and max_credit) how would you sort the array by apr in ASC order. 2.) Say you had the same array of objects how would you find the objects that apr are within a range? 3.) How would you check if a string is a palindrome manually?

First round : A problem with page structure was given. It was kind of a recursive problem and the idea was to show it the same way on the front end (Eg directory structure). The expectation here is to tell the interviewer your approach, ask clarifying questions before hand and keep the interviewer engaged in conversation. Try to list down error-handling scenarios. If you follow TDD you might get bonus point here. Round 2 : I was asked to implement a production-level feature toggle utility kind of function. I tried to did it in TDD way to some extent and show a working solution in react. Unfortunately, I clear this round. I am not clear on what was the expectation here, was it more of a library function like a package and not a solution demonstrated in a working project?
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Senior Software Engineer Front End

Interviewed at Atlassian

3.1
Jun 20, 2023

First round : A problem with page structure was given. It was kind of a recursive problem and the idea was to show it the same way on the front end (Eg directory structure). The expectation here is to tell the interviewer your approach, ask clarifying questions before hand and keep the interviewer engaged in conversation. Try to list down error-handling scenarios. If you follow TDD you might get bonus point here. Round 2 : I was asked to implement a production-level feature toggle utility kind of function. I tried to did it in TDD way to some extent and show a working solution in react. Unfortunately, I clear this round. I am not clear on what was the expectation here, was it more of a library function like a package and not a solution demonstrated in a working project?

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