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Senior Backend Engineer Interview Questions

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2,039 senior backend engineer interview questions shared by candidates

They asked in detail about my current experience, specifically how I handled and resolved production-level issues, what the problem was, how I diagnosed it, and the steps I took to fix it and prevent it from happening again.
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Senior Backend Engineer

Interviewed at Semperis

4.2★
Nov 13, 2025

They asked in detail about my current experience, specifically how I handled and resolved production-level issues, what the problem was, how I diagnosed it, and the steps I took to fix it and prevent it from happening again.

Create a function that can recognize if all characters in a string appears as often. Modify this function so that you are allowed to remove one char to make it work. Example "aabbcc" is valid when "aaabb" is not. Using the last rule, "aaabb" is valid because you can remove an "a"
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Senior Backend Engineer

Interviewed at Bolt

3.4★
Nov 27, 2018

Create a function that can recognize if all characters in a string appears as often. Modify this function so that you are allowed to remove one char to make it work. Example "aabbcc" is valid when "aaabb" is not. Using the last rule, "aaabb" is valid because you can remove an "a"

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