Salesforce built Digital Wallet, a consumption-based pricing platform serving 15,000+ organizations and generating $400M+ in annual contract value. The engineering team overcame significant challenges as Data Cloud's first customer, including implementing SOX-compliant metadata security through Strict System Mode, building a custom event subscriber processing 20M daily events, and architecting failover strategies for near real-time usage tracking. The platform integrates multiple systems using fan-out mechanisms for entitlement sync, implements Spark job failover between EMR-on-EKS and EMR-on-EC2 to avoid rate limits, and maintains billing accuracy through architectural separation of hourly customer-facing updates from monthly financial reconciliation. The system includes high-cardinality monitoring, automatic retry logic, and a month-long buffer for usage reconciliation before billing.
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