Real-time transaction alerts for a bank

Customers needed to hear about payments, low balances and suspicious activity immediately, across SMS, email and app, without a single message lost or sent twice.

• ✦Service-oriented Java backend consuming core-banking events
• ✦Rules engine for customer-configurable alert conditions
• ✦Idempotent delivery with retry queues across SMS, email and push
• ✦Audit trail and monitoring to meet banking compliance

Alerts in seconds for a large customer base, running in production for years. Details of the bank stay confidential.