Node.js & Express Interview Guide with Vivek Kushwaha

Stop struggling with backend theoreticals and learn how to ace Node.js and Express interviews. This guide walks you through the exact technical expectations hiring managers have for backend engineers, categorized by experience level: Fresher (0-1 Years), Experienced (1-4 Years), and Expert (4+ Years).

Learn how to articulate complex concepts like the V8 Event Loop, microtask queues, centralized error handling, and robust JWT authentication. For senior roles, the guide dives deep into production-grade challenges such as scaling single-threaded Node apps across AWS EC2 instances, handling 5GB file uploads with Streams, preventing memory leaks, and building highly available microservices.

Includes a real-world system design challenge for building rate-limiting middleware using Redis, complete with the failure-state strategies required to keep enterprise APIs alive during high-volume traffic spikes.