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Senior Backend Engineer Interview Questions

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2,798 senior backend engineer interview questions shared by candidates

Could you tell us what’s pushing you to leave your current company? What are you really after in your next career move? How far are you in the process of searching for your next role? Are you ready to make your next move or are you just thinking about it? (Some context about your current situation and your expectations would help us a lot).
avatar

Senior Backend Engineer

Interviewed at Fonoa

4.4★
Feb 11, 2022

Could you tell us what’s pushing you to leave your current company? What are you really after in your next career move? How far are you in the process of searching for your next role? Are you ready to make your next move or are you just thinking about it? (Some context about your current situation and your expectations would help us a lot).

Could you tell us about a time in which you had to solve a complex problem with a simple solution? Describe the context, the situation you were in, the steps you took to deal with it and the outcome. It would be helpful if you can explain this in a way in which non-technical people can follow and understand it.
avatar

Senior Backend Engineer

Interviewed at Fonoa

4.4★
Feb 11, 2022

Could you tell us about a time in which you had to solve a complex problem with a simple solution? Describe the context, the situation you were in, the steps you took to deal with it and the outcome. It would be helpful if you can explain this in a way in which non-technical people can follow and understand it.

A coding challenge question was nice. I received a SpringBoot application with maven project. It also had integration tests. The question was to create 3 Rest endpoints with straight forward logic. The challenging part is not to implement the requirements but to implement it in a codility environment. Codility is the worst platform to implement a modular application, it works for small algorithmic problems. Despite I was able to run full problem in my IDE (Which they also recommend), I was not able to detect why it failed to compile and run on the codility. It is difficult to implement, copy to codility and make it run on codility within 2 hrs.
avatar

Senior Backend Engineer

Interviewed at Scalable Capital

3.7★
Apr 28, 2025

A coding challenge question was nice. I received a SpringBoot application with maven project. It also had integration tests. The question was to create 3 Rest endpoints with straight forward logic. The challenging part is not to implement the requirements but to implement it in a codility environment. Codility is the worst platform to implement a modular application, it works for small algorithmic problems. Despite I was able to run full problem in my IDE (Which they also recommend), I was not able to detect why it failed to compile and run on the codility. It is difficult to implement, copy to codility and make it run on codility within 2 hrs.

The problem was about finding the minimum amount of water fountains required to fully cover all of the positions of land, given an array with fountain coverages. For every test case, the input said it had N values, but when logging the input, there were always N - 1. After noticing this, I didn't even bother to finish it.
avatar

Senior Backend Developer

Interviewed at Rappi

3.7★
Jul 20, 2020

The problem was about finding the minimum amount of water fountains required to fully cover all of the positions of land, given an array with fountain coverages. For every test case, the input said it had N values, but when logging the input, there were always N - 1. After noticing this, I didn't even bother to finish it.

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