1. Why Synchronous Workflows Paralyze High-Traffic Stores
Executing slow third-party API integrations (e-invoicing, couriers, notifications) synchronously inside the HTTP request loop balloons response latency and causes cascading failures.
2. The Stilmerce Asynchronous Queue Topology
Checkout returns instantly. Background duties are queued into isolated BullMQ streams, processed by sandboxed workers with automatic exponential retries and Dead-Letter Queue (DLQ) isolation.
3. Resilient Worker Implementation and DLQ Governance
With concurrency limits, automatic retry backoffs, and DLQ tracking, transient network drops never lead to lost shipments or unbilled orders.