1. Explain how Node.js works internally and its event-driven architecture

how Node.js is structured.

2. How does the event loop handle asynchronous operations in Node.js

3. How do you design scalable and high-performance Node.js applications

• Expert in advanced JavaScript, strong coding proficiency with Node.js and its frameworks.
• Understanding of the nature of asynchronous programming and its quirks and workarounds.
• Working knowledge of Promises, call back hell and ways to avoid it.
• Experience with real-time technologies like engine.io, socket.io (preferred)
• AWS experience including EC2, SQS, SNS, Lambda, API Gateway a plus • Familiarity with database technologies such as MongoDB, MySQL, PostgreSQL etc.
• Familiarity with cloud message APIs and push notifications
• Restful web services, service-oriented architectures
• Experience with threading, and performance tuning
• Understanding of the differences between multiple deliveries platforms, such as mobile vs. desktop, and optimising output to match the specific platform
• Understanding fundamental design principles behind a scalable application.
• Hands-on experience on Live Streaming tools and real-time communications would be a good to have.
• Advanced JavaScript & Node.js proficiency
• Asynchronous programming and workaround techniques
• Handling Promises & avoiding callback hell • Experience with real-time technologies (e.g., socket.io) • AWS services: EC2, SQS, SNS, Lambda, API Gateway
• Expertise in databases (MongoDB, MySQL, PostgreSQL)
• Familiarity with cloud messaging APIs & push notifications