NodeJS Microservice COMPLETE Production Level Course - I Mastered Microservices Architecture in NodeJS and You Can Too!

Node.js microservices, customer service refactor, product service events, API gateway, and clean architecture — in this Part 2 tutorial you’ll learn how to restructure models, repositories, and inter-service communication. We start by cleaning up the Customer Service models, removing product/order responsibilities and keeping only customer-specific data like address, wishlist, cart, and orders using embedded objects instead of cross-service models. Then we refactor the repository and service layer to match this new design, keeping a strict 3-layer architecture (API → Service → Repository) so each layer has a single responsibility and is easy to test. You’ll see how to expose customer-specific APIs, handle wishlist and cart operations, and update orders cleanly. Next, we move to the Product Service, simplify its models and repositories, and introduce an event-style communication pattern using HTTP/webhooks. We add an app-events endpoint, use Axios to publish events, and wire the Product Service to notify the Customer Service whenever users add items to their wishlist. By the end, you’ll understand how to split responsibilities, design payloads for inter-service communication, and keep your microservices decoupled but still integrated. If this helped you, subscribe for more practical Node.js, microservices, and deployment content. 🔔 Subscribe @codewithjay for more advanced Node.js tutorials and system design content 👍 Like if this helped you understand microservices better 💬 Comment below with your biggest microservices challenge 🎥 RELATED VIDEOS 🔗 Communication → Node.js microservices: The best way to communicate between them 👉 https://youtu.be/qvJpsQCH954 🔗 Next → https://youtu.be/oTlGd-CLpG8 🔗 Architecture → Clean architecture using Node.js in easy way 👉 https://youtu.be/neGIM7BpluM You can find the source code from the link below to compare your code. https://github.com/codergogoi/Grocery_Online_Shopping_App.git 👉 How it will help you: Node.js Performance Optimization System Design Interview Preparation #Microservices #NodeJS #SystemDesign #BackendDevelopment #ScalableArchitecture #nodejs #nodejsmicroservice #microservicesarchitecture #distributedsystems #nodejemosdeconectarnos #nodejs #microservices #javascript #backenddevelopment #apigateway #cleanarchitecture #ecommerce #webdevelopment #softwarearchitecture #learncoding 📚 CHAPTERS 00:00 – Welcome back & why you should watch Part 1 first 01:05 – Cleaning up Customer Service models (what really belongs here) 03:10 – Fixing Customer schema: wishlist, cart & embedded product objects 06:02 – Removing product/order models from Customer Service 07:40 – Refactoring Customer repository methods (wishlist, cart, orders) 10:05 – Updating Customer Service layer logic for new data structures 12:18 – Simplifying Customer API endpoints & URL structure 14:02 – Introducing app-events: webhook-style event handler for customers 16:20 – Wiring customer events into Express & testing with a sample payload 18:40 – Testing Customer Service via API Gateway & Postman 21:05 – Starting Product Service refactor: cleaning models & removing customer/order 23:15 – Reviewing Product repository & service methods (create, list, category, selected) 25:10 – Adding app-events to Product Service & installing Axios publisher 27:05 – Implementing event publishing from Product to Customer (wishlist flow) 29:40 – Final review: how services communicate via events in this architecture