Most fraud detection happens after the fact — by which point the damage is already done. In this technical walkthrough, engineer Marina Popova breaks down how to build a real-time detection and enrichment layer on Google Cloud Platform using Volt Active Data (VoltDB) to evaluate every transaction before it completes, block fraud mid-flight, and add geographic context via IP-to-location mapping. A practical blueprint for teams building on GCP who need sub-millisecond decisioning without ripping out their existing infrastructure.
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