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Senior Backend Developer Interview Questions

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744 senior backend developer interview questions shared by candidates

1- What do you do in your current role and position? 2- How large is your team? 3- How is the release process in your project? How is your project going to be live for your customers? 4- After the release and going to live with your project, how you are sure everything works well? How do you check it? 5- How is the process of merging a merge request in your team? 6- Why you are interested in Lodgify? 7- Why you are leaving your current job? 8- What is the difference between integration tests and unit tests and when do we use each of them? 9- How many unit and integration tests you would write for a solution? 10- What are the downsides and upsides of using Microservices? 11- What do you know about SOLID abbreviation? (tell me about open/closed, what does it mean in reality? give an example) 12- How does the Garbage collector work in .Net? 13- Do you know async\await? How does the .Net handle it? 14- Do you have experience with performance optimization and memory leaks?
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Senior Backend Developer (.NET/C#)

Interviewed at Lodgify

4.3★
Nov 29, 2023

1- What do you do in your current role and position? 2- How large is your team? 3- How is the release process in your project? How is your project going to be live for your customers? 4- After the release and going to live with your project, how you are sure everything works well? How do you check it? 5- How is the process of merging a merge request in your team? 6- Why you are interested in Lodgify? 7- Why you are leaving your current job? 8- What is the difference between integration tests and unit tests and when do we use each of them? 9- How many unit and integration tests you would write for a solution? 10- What are the downsides and upsides of using Microservices? 11- What do you know about SOLID abbreviation? (tell me about open/closed, what does it mean in reality? give an example) 12- How does the Garbage collector work in .Net? 13- Do you know async\await? How does the .Net handle it? 14- Do you have experience with performance optimization and memory leaks?

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★
Apr 2, 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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