Stripe Integration Interview Round

No other company's loop has anything like the integration round. There is no algorithm hidden in it. You clone a private starter repo, get a set of API docs, and build a small feature that talks to a real payments API over HTTP. The open internet is yours. AI assistants are not. People who have done it keep saying the same thing: it feels more like a design round than a coding round.

The most-reported task is the "request replayer." You are handed a file of recorded HTTP requests, something like requestlog-charges.json. Your job is to replay them against api.stripe.com and check that each one worked. The wrinkle that makes it real: the recorded requests and the live responses carry their own IDs and timestamps, so you cannot compare response bodies for equality. You validate on the HTTP status code instead. Get a 200 back, the replay succeeded. One constraint, and it sets the shape of the whole problem.