Things Clone Coding Doesn't Tell You (Security, DDD, Microservices) Part 2

Take advantage of TypeScript's features!

Have you ever wondered why we use these techniques while watching the Clone Coding lecture? Let me give you a big picture of backend development!

Learn how to use Cypress to auto-login and auto-purchase features

Master React rendering principles and optimization to apply them in real-world situations and prepare for interviews!

Master the complexities of React development, including custom hooks, TDD, the context API, refactoring, and complex state management.

Shows a microservice development process that applies Domain-Driven Design, Hexagonal Architecture, and Event-Driven Architecture.

If Java has Spring and Python has Django, Node has NestJS! Learn Node's professional backend NestJS and Node's object-oriented programming and design patterns! This course is a membership subscription course, and if you purchase it once, you can take the continuously added NestJS techniques, DB, testing, etc.

Ladies A to Z for a solid start to Ladies! Everything about Ladies that is easy and fun to understand, even for high school students.

When you're doing backend development, at some point you face this dilemma. As services grow and traffic increases, there comes a moment when simple REST communication and CRUD structures feel limiting. I experienced the same problem in real-world work and went through many trials and errors between performance and structural complexity. The solution I chose in that process was NATS. Its simple configuration based on a single binary, ultra-low latency performance in microseconds, and the fact that it provides just the right amount of essential features for real work—from Pub/Sub to Queue Groups and JetStream—made it a very practical choice in actual service environments. This course is not about listing NATS features. Based on the problems I faced in real work, I explain with code and flow diagrams which situations led me to choose NATS, why, and how I designed the architecture. This is a course designed to help everyone—from those new to messaging systems, to backend developers preparing for jobs, to senior developers contemplating better architectures—understand distributed systems and grow to the next level.

An Express.js journey from beginner to mastery, flowing like water! A backend journey where you learn properly by directly implementing from basic server concepts to completing a CRUD project.

Understanding Spring Boot + React.js Login (+Social) Service is a course designed to help you deeply understand the authentication flow between frontend and backend, by directly implementing a practical login system that includes JWT-based authentication and social login (Kakao/Google). The frontend is built on React.js, and the backend on Spring Boot, enabling you to learn step by step the practices used in real service environments, such as the Access Token + Refresh Token approach, user state management using HttpOnly Cookie and Redux, Role-based authorization, and social login integration.

In this course, you will be able to create a Reddit website from scratch, step by step.

This course covers the essential principles and practical techniques of Node.js that you must know before diving into real-world front-end or back-end development.

This article introduces the relationship between Nodejs, a server-side JavaScript language, and a database, and explains how to create web applications using Nodejs and a database.