Affirm·Software Engineer

Affirm Software Engineer interview experience

Posted Feb 2024 · Candidate report, summarized by Dataford

My interview centered on a coding task that asked me to implement two functions: one to implement store_loan(volume) and another to return get_loan_volume() for loans from the last hour.

From there, the discussion shifted to how I’d think about complexity, what kinds of optimizations I’d consider, and how to design something that used constant space.

The question itself felt like it was testing practical engineering thinking rather than just syntax. The hard part wasn’t only getting something to work, but reasoning clearly about constraints and tradeoffs as the “last hour” window kept moving.

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