Microservices

Article 20: End-to-End Microservices Project

By Utility Zone · 2026-01-28T11:23:32.069345

1. Objective

Tie together all concepts by building a real-world microservices system.

2. Project Overview

Food Ordering System

Services:

  • API Gateway
  • User Service
  • Order Service
  • Payment Service
  • Inventory Service
  • Config Server
  • Discovery Server

3. Architecture Overview

Client
  |
API Gateway
  |
----------------------------
| User | Order | Payment | Inventory |
----------------------------

4. Technology Stack

  • Spring Boot
  • Spring Cloud
  • Eureka
  • API Gateway
  • Kafka
  • Docker
  • Kubernetes

5. End-to-End Flow

  1. User places order
  2. Order event published
  3. Payment processed
  4. Inventory updated
  5. Order confirmed

6. Key Design Decisions

  • Database per service
  • Saga pattern
  • Event-driven communication
  • Gateway security

7. Deployment Flow

  • Build JARs
  • Dockerize services
  • Push images
  • Deploy on Kubernetes

8. Common Pitfalls

  • Overengineering
  • Too many services
  • Ignoring observability

9. Interview Talking Points

  • Explain full request lifecycle
  • Trade-offs made
  • Failure handling

10. Summary

This project demonstrates production-ready microservices knowledge.

11. What’s Next

Deepen Kubernetes, CI/CD, and cloud-native practices.