Enterprise warehouse management systems (WMS) require unyielding reliability. When handling real-time inventory adjustments, Purchase Orders (PO), and Delivery Orders (DO) across multiple distribution nodes, every millisecond of database lock latency can ripple through logistics operations.
1. Modular Architecture with NestJS
By utilizing NestJS modules, we decouple core logistics logic into isolated services: InventoryService, OrderService, and AuditLogService. Dependency injection enables clean unit testing and effortless integration with message queues.
2. PostgreSQL Query Optimization & Indexing
Database indexes must be tailored for high-write inventory ledgers. Using composite indexes on (sku_id, warehouse_id, status) reduced query execution time from 340ms to under 12ms under heavy load.
3. Optimistic Locking for Concurrent Stock Updates
Race conditions in warehouse stock management are mitigated using version column optimistic locking, eliminating deadlocks when multiple workers scan items simultaneously.