Senior Backend Engineer Interview Questions

2,042 senior backend engineer interview questions shared by candidates

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.
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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.

- Implement a function to filter data. I liked that it was not a basic leet code problem. - Basic leet code problem string compression/decompression exercise. - System's design problem related to a potential feature used at Affirm. - Standard behavioral interview questions.
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Sr. Software Engineer (Backend)

Interviewed at Affirm

4
Jun 6, 2024

- Implement a function to filter data. I liked that it was not a basic leet code problem. - Basic leet code problem string compression/decompression exercise. - System's design problem related to a potential feature used at Affirm. - Standard behavioral interview questions.

Generic question like overall experience and domain knowledge ( which I had). Tech round involved some deep dive on the system design topic like performance, including some not so difficult coding challenge. In the 'Meet the team' round they asked me some more technical questions but it was mostly informal.
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Senior Backend Engineer

Interviewed at Oviva

4
Aug 21, 2023

Generic question like overall experience and domain knowledge ( which I had). Tech round involved some deep dive on the system design topic like performance, including some not so difficult coding challenge. In the 'Meet the team' round they asked me some more technical questions but it was mostly informal.

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