Processing 100,000 Invoices/Hour: High-Throughput REST APIs and Webhook Architecture

Scaling Billing for E-Commerce and Telecom Bursts

When an enterprise consumer platform executes a flash sale or generates monthly subscription invoices for 500,000 users, traditional synchronous web APIs buckle under database connection pool exhaustion and lock contention.

Architectural Best Practices for High-Velocity Billing

• Idempotency Keys: Prevent duplicate billing by requiring unique idempotency UUIDs on all POST requests.
• Asynchronous Message Queues: Offload invoice rendering, PDF generation, and email dispatch to background Redis/BullMQ worker clusters.
• Event-Driven Webhooks: Transmit real-time event notifications (e.g., invoice.finalized, payment.captured) to upstream enterprise ERPs like SAP and NetSuite.

Integrate with Relaso Enterprise REST API & Webhook Suite for mission-critical scale.