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Circuit breaker implementation in Java: The service A calls service B and service C every time. If one service fails 3-times in 10 minutes ( or 20 seconds in the implementation) the next call will be blocked for 5 minutes (10 seconds in the implementation). There was given a simulation of remote method calls, I needed to implement only the execute() which calls the remote service if possible.
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Senior Backend Java Engineer

Interviewed at Wise

3.6★
Feb 19, 2026

Circuit breaker implementation in Java: The service A calls service B and service C every time. If one service fails 3-times in 10 minutes ( or 20 seconds in the implementation) the next call will be blocked for 5 minutes (10 seconds in the implementation). There was given a simulation of remote method calls, I needed to implement only the execute() which calls the remote service if possible.

I had to work on a codebase with a model class, a service interface and a third class with some business logic based on the other two. There were some missing names, logic, etc. The purpose of the interface and the business logic class were provided in javadoc style comments.
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Associate Java Developer

Interviewed at Wise

3.6★
Jan 22, 2022

I had to work on a codebase with a model class, a service interface and a third class with some business logic based on the other two. There were some missing names, logic, etc. The purpose of the interface and the business logic class were provided in javadoc style comments.

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