// Visual learning guide

Microservices
made simple.

Learn distributed system design patterns through real-world analogies, interactive diagrams, and bite-sized lessons — no PhD required.

6
Design Patterns
Real Examples
8
Quiz Questions

🍕 The Restaurant Analogy

Imagine running a restaurant. How you organize the kitchen tells the whole story.

MONOLITH

🧑‍🍳 One Chef Does Everything

One super-chef takes your order, cooks all dishes, prepares drinks, handles billing, and cleans the table. If they get sick — the whole restaurant shuts down. They can't scale when it gets busy.

MICROSERVICES

👨‍🍳👩‍🍳 Specialized Teams

Separate teams: a pizza chef, a dessert chef, a bartender, a cashier. Each does one thing perfectly. Busy dessert night? Add more dessert staff. Pizza chef sick? Other stations still run fine.

📐 Architecture Diagram

Monolith

SINGLE DEPLOYMENT User Interface Business Logic Auth Module Payment Module Shared Database

Bug in payments?
Whole app goes down.

Microservices

API GATEWAY User Service Order Service Pay Service DB DB DB Independent services · Own data · Isolated

Payment service fails?
Orders still work!

⚠️ When Monolith Wins

  • 🚀 Small team (< 5 devs)
  • 📦 Simple domain boundaries
  • ⏱ Time to market is critical
  • 🆕 Early-stage startup

✅ When Microservices Win

  • 📈 Scale individual features
  • 🔧 Multiple tech stacks needed
  • 🏢 Multiple teams working independently
  • 🌍 High availability requirements
🚪

API Gateway

The single front door to all your services. Routes requests, handles auth, rate limiting and more.

Routing
📨

Event-Driven

Services communicate by publishing and subscribing to events. Completely decoupled!

Async
🧩

Saga Pattern

Manage distributed transactions across services with choreography or orchestration.

Transactions

Circuit Breaker

Prevent cascading failures by stopping calls to a service that's struggling.

Resilience
📖

CQRS

Separate read and write models for better performance and scalability.

Performance
🏍️

Sidecar Pattern

Attach helper containers alongside each service for logging, monitoring, and proxying.

Infrastructure