Back to All Articles
High-Performance TypeScript Patterns for Node.js Backends
TypeScript on the backend brings compile-time confidence, but poor typing patterns can produce slow runtime validation or memory retainment under heavy enterprise throughput.
Branded Types for Domain Integrity
Prevent accidental ID cross-contamination by creating branded primitive types for distinct entities like UserID, OrderID, and InvoiceID.
typescript
type Brand<K, T> = K & { __brand: T };
export type UserId = Brand<string, 'UserId'>;
export type OrderId = Brand<string, 'OrderId'>;
function dispatchOrder(userId: UserId, orderId: OrderId) {
// Compiler guarantees OrderId cannot be accidentally passed as UserId!
}Key Architecture Takeaways
- Enforce boundary validation with runtime schemas like Valibot or ArkType.
- Always clean up event listeners on pooled sockets to prevent silent memory accumulation.