Problem
Architect a real-time ledger system for Affirm that records user transactions, ensuring strict transaction consistency, auditability, and zero data loss.
Practicing as: Software Engineer interview at AffirmHi, I'll play your Affirm interviewer for the Software Engineer role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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