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Senior Frontend Engineer Interview Questions

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2,921 senior frontend engineer interview questions shared by candidates

Use React to make a 4x4 grid where each cell can have a normal, active, or dead state (should be reflected with colors). Clicking a cell will toggle it between normal and active, and activating a normal cell while another cell is active will make those two cells "fight" (use random number) and return one to normal and the other to dead. At the end, output the winning cell and all the cells that that cell defeated. Follow up: "What would you change about the code if you were going to add more functionality to the cells later"
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Senior Frontend Engineer

Interviewed at Ramp

3.7★
Jul 26, 2022

Use React to make a 4x4 grid where each cell can have a normal, active, or dead state (should be reflected with colors). Clicking a cell will toggle it between normal and active, and activating a normal cell while another cell is active will make those two cells "fight" (use random number) and return one to normal and the other to dead. At the end, output the winning cell and all the cells that that cell defeated. Follow up: "What would you change about the code if you were going to add more functionality to the cells later"

Write a calendar with overlaying events from scratch. It should have 1 column with hour markers, another column with events spanning these hours. Add input fields panel. User should be able to create/edit/delete these events Clicking on any event should autofill the input and allow for edit. All this in 45 mins time. Good luck!
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Senior Frontend Engineer

Interviewed at Ramp

3.7★
Jan 24, 2025

Write a calendar with overlaying events from scratch. It should have 1 column with hour markers, another column with events spanning these hours. Add input fields panel. User should be able to create/edit/delete these events Clicking on any event should autofill the input and allow for edit. All this in 45 mins time. Good luck!

Most of the assessment question were centred around the specific requirement topics, which in my case were tightly related to 3D and Three.js. Other than that, the focus was primarily on the experience and general conceptual programming knowledge.
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Senior Frontend Developer

Interviewed at Promaton

4.3★
Apr 15, 2025

Most of the assessment question were centred around the specific requirement topics, which in my case were tightly related to 3D and Three.js. Other than that, the focus was primarily on the experience and general conceptual programming knowledge.

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