Enterprise-grade customer analytics data flow combining real-time fraud detection and batch segmentation across banking sources. Data flows from Core Banking, Online Banking, Mobile App, and Branch Systems through Kinesis and MSK into dual-path processing: Apache Flink CEP for sub-100ms fraud scoring and Apache Airflow-orchestrated Spark ETL for nightly customer segmentation. Raw events land in S3 Bronze tier, transform through Silver (dbt-curated) and Gold (aggregated) tiers, then route to operational Redis and analytical Snowflake/Redshift destinations. AWS Glue catalogs all layers while CloudWatch, CloudTrail, GuardDuty, and Macie enforce governance, encryption (TLS 1.3/AES-256), and compliance across the pipeline. Fork this diagram to customize data sources, add new destinations, or adjust latency thresholds for your regional bank architecture. The layered medallion approach with dual real-time and batch paths demonstrates how enterprises balance operational fraud prevention with strategic customer insights.