Practical Guide: Building Microservices with DDD, CQRS, Redis and RabbitMQ

A technical guide published on DEV Community outlines how to build a microservices-based Orders and Inventory system using Node.js, TypeScript, PostgreSQL, Redis, and RabbitMQ. The architecture applies Domain-Driven Design to organize code around business concepts such as Orders and Stock, rather than generic technical folders. CQRS separates write operations, which enforce business rules, from read operations, which can be cached in Redis for faster queries. Asynchronous communication via RabbitMQ decouples services, so the Orders service publishes events like OrderCreated without directly calling the Inventory service. The guide also acknowledges eventual consistency as an expected trade-off in distributed systems where data may be briefly out of sync between services.