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Domain · Technical Depth

Walk me through the technical constraints of building a real-time fraud-scoring system for card transactions, where you have tens of milliseconds and can't afford to block legitimate spend.

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The hard constraint is that the score has to return inside the authorization round trip — the network expects an approve-or-decline in well under a second, and my model budget is m…

The full answer: structure, worked example, likely follow-up.

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