Design Principles in Systems Architecture

Decoupling

Minimize dependencies between components to allow independent development, testing, and deployment of individual features.

                        // Example of decoupled services
                        class MessagingService {
                            sendNotification(message);
                        }

                        class UserService {
                            constructor(messagingService) {
                                this.messagingService = messagingService;
                            }
                        }
                    

Scalability

Design systems to handle growth by increasing capacity horizontally (more machines) or vertically (more powerful hardware).