Brex Software Engineer interview experience

A short while later I moved into a coding round that was very “real data” flavored: I was given a URL and had to use an HTTP library to pull back transaction data. Then the interviewer asked me questions that depended on that dataset—things like counting transactions, calculating total spending for a month, and doing datetime-heavy analysis such as finding transactions made on the same day across consecutive months or identifying activity patterns across seven straight days involving the same merchant.

After that, I hit a debugging round tied to delivery times and calendar holidays. The code