Event-Driven Node.js: Decoupling Production Systems at Scale

Direct function calls and tight coupling in Node.js create maintenance bottlenecks that compound as systems grow, requiring changes to ripple across multiple modules. Event-driven architecture solves this by enabling loose coupling between subsystems, making code more extensible and testable without the operational overhead of external message brokers. Mastering EventEmitter patterns—including synchronous execution, error handling, and memory leak prevention—is essential for building resilient production systems.