Senior Backend Python Developer Interview Questions

12 senior backend python developer interview questions shared by candidates

Cod assignment: They asked me to create a web server with three math APIs(e.g. Fibonacci, ...) and to log the runtime of APIs, they gave me a review about my code, that the logger that I implemented is not efficient and so simple, but the point is that when I received the code assignment, I asked them about how do they need the logger to be implemented, is it OK to just write a simple custom logger or there are some other expectations that need to be satisfied, and they told me that I can write a custom one
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Senior Python Backend Developer

Interviewed at Klarna

3.1
15 Sept 2021

Cod assignment: They asked me to create a web server with three math APIs(e.g. Fibonacci, ...) and to log the runtime of APIs, they gave me a review about my code, that the logger that I implemented is not efficient and so simple, but the point is that when I received the code assignment, I asked them about how do they need the logger to be implemented, is it OK to just write a simple custom logger or there are some other expectations that need to be satisfied, and they told me that I can write a custom one

Cod assignment: They asked me to create a web server with three math APIs(e.g. Fibonacci, ...) and to log the runtime of APIs, they gave me a review about my code, that the logger that I implemented is not efficient and so simple, but the point is that when I received the code assignment, I asked them about how do they need the logger to be implemented, is it OK to just write a simple custom logger or there are some other expectations that need to be satisfied, and they told me that I can write a custom one
avatar

Senior Python Backend Developer

Interviewed at Klarna

3.1
15 Sept 2021

Cod assignment: They asked me to create a web server with three math APIs(e.g. Fibonacci, ...) and to log the runtime of APIs, they gave me a review about my code, that the logger that I implemented is not efficient and so simple, but the point is that when I received the code assignment, I asked them about how do they need the logger to be implemented, is it OK to just write a simple custom logger or there are some other expectations that need to be satisfied, and they told me that I can write a custom one

Write a balance transfer service between two account in a concurrent environment. Draft test/example usage (part of the spec): ``` from_account = Account(...) to_account = Account(...) service = BalanceTransferService() service.transfer(from_account, to_account, amount) # assert ... ```
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Senior Python Backend Developer

Interviewed at Revolut

4
2 Apr 2025

Write a balance transfer service between two account in a concurrent environment. Draft test/example usage (part of the spec): ``` from_account = Account(...) to_account = Account(...) service = BalanceTransferService() service.transfer(from_account, to_account, amount) # assert ... ```

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