System Design

Real-Time Fraud Detection Streaming Pipeline

System Design diagram · made in Skemio

Real-time fraud detection pipeline diagram showing payment gateway, Kafka, Apache Flink with Redis feature store, and ML scoring engine.
Real-time fraud detection pipeline diagram showing payment gateway, Kafka, Apache Flink with Redis feature store, and ML scoring engine.
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What it shows

  • Kafka streams raw transactions instantly to low-latency stream workers.
  • Stream processor joins live events with precomputed historical features.
  • ML inference engines score fraud risk before authorizing the payment.

The takeaway

Enriching live events with real-time state lets ML models score fraud under 50ms.

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