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Senior Frontend Developer Interview Questions

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1,608 senior frontend developer interview questions shared by candidates

The interview process was well-structured and covered a wide range of frontend topics, including React, TypeScript, performance optimization, testing, and CI/CD. Questions focused on team collaboration, handling complex projects, web performance, React rendering optimizations, and API efficiency. There were also in-depth discussions on JavaScript concepts like async/defer, blocking vs. non-blocking requests, and font loading issues. Additionally, algorithm and data structure questions were included, along with best practices for writing tests, reviewing merge requests, and maintaining code quality in large-scale projects. The process was challenging but insightful, assessing both technical depth and problem-solving skills.
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Senior Frontend Developer

Interviewed at Semrush

4★
Mar 13, 2025

The interview process was well-structured and covered a wide range of frontend topics, including React, TypeScript, performance optimization, testing, and CI/CD. Questions focused on team collaboration, handling complex projects, web performance, React rendering optimizations, and API efficiency. There were also in-depth discussions on JavaScript concepts like async/defer, blocking vs. non-blocking requests, and font loading issues. Additionally, algorithm and data structure questions were included, along with best practices for writing tests, reviewing merge requests, and maintaining code quality in large-scale projects. The process was challenging but insightful, assessing both technical depth and problem-solving skills.

After 3 days, I got a call, that ready for round 2 which was a codility test. I was not aware about the codility environment, so I was not able to clear this round. But questions were easy Q1. There is a nested menu data given. Show the menu when the submenu item is given, otherwise, only show the nav button. There were other requirements like: color of the menu, properties of the menu given. You need to use all the data which is given there Q2. There is an array with values name, content, rating. You need to write the logic to show star rating populated and empty stars based on the array value. Q3. Didn’t attempted, as time was not enough. But fetch data from api and show the country list and then there were scenarios on the basis of that your data will show up. Not able to recall correctly, but I guess search condition and flags of the country should also show up. When you execute your program, all the test cases should be executed. Only then, it will be considered as a completed one
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Senior Frontend Developer

Interviewed at GlobalLogic

3.8★
Sep 27, 2022

After 3 days, I got a call, that ready for round 2 which was a codility test. I was not aware about the codility environment, so I was not able to clear this round. But questions were easy Q1. There is a nested menu data given. Show the menu when the submenu item is given, otherwise, only show the nav button. There were other requirements like: color of the menu, properties of the menu given. You need to use all the data which is given there Q2. There is an array with values name, content, rating. You need to write the logic to show star rating populated and empty stars based on the array value. Q3. Didn’t attempted, as time was not enough. But fetch data from api and show the country list and then there were scenarios on the basis of that your data will show up. Not able to recall correctly, but I guess search condition and flags of the country should also show up. When you execute your program, all the test cases should be executed. Only then, it will be considered as a completed one

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