Senior Backend Interview

API Design Interview: The Endpoint Works. Now Someone Else Has to Use It.

October 27, 2026·5 min read

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API Design Interview: The Endpoint Works. Now Someone Else Has to Use It.

Most API interviews turn into a style argument about plurals and status codes. The decisions that cost money are elsewhere. Here are four tasks on a running service that test retries, compatibility, pagination and error design, with what a strong answer sounds like.

Senior Backend Interview

API Design Interview: The Endpoint Works. Now Someone Else Has to Use It.

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