Node.js runs one event loop per process—only one CPU core is used. To scale, use Cluster for multi-process or Worker Threads for multi-thread. Both enable parallelism, but in different ways.

Node.js achieves high concurrency not by multi-threading, but through its event-driven, non-blocking I/O model. It efficiently overlaps I/O waiting time across requests, allowing a single thread to handle thousands of connections.

An in-depth exploration of the architecture and implementation of a group chat system, covering group creation, subscription, real-time messaging, and gRPC-based communication between microservices.

An in-depth look into the one-to-one chat architecture and its implementation for handling text and media messages.

A modular backend system for managing travel expenses, built with Node.js and Express, featuring microservices, message queues, and integration with third-party APIs.

A scalable, real-time chat platform leveraging Web3 authentication, microservices architecture, and message queuing for high concurrency and performance.

Learn how I built a message queue microservice using gRPC and RabbitMQ, with support for direct and fanout publish/subscribe models.

An innovative Web3 wallet-based authentication system, ensuring secure access to chat applications without traditional password-based login methods.

A gRPC-based push notification microservice.