Affirm Software Engineer interview experience

The coding portion was a 60-minute HackerRank session, and it felt like the technical bar was real but clear.

The system design round stood out because it was tailored to fintech. I talked through payments and how to keep the ledger consistent, what idempotency looks like in practice, and how loan servicing can be handled reliably. There was also a behavioral conversation with the hiring manager. Even though I’d expected more generic prompts, the focus on payments/ledger behaviors made the whole process feel coherent, and the expectations were grounded in the domain.