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🧩 Design Patterns Hub

Write Code That
Scales & Lasts

5 essential guides on software design — SOLID principles, all 23 Gang of Four patterns, the 12-Factor methodology, microservice architecture and infrastructure-as-code with Terraform.

5Guides
23GoF Patterns
Java ExamplesThroughout
Beginner→AdvancedAll Levels
🗺 Recommended Learning Path
1SOLID Principles
→
2GoF Patterns
→
312-Factor Apps
→
4Microservice Architecture
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5Terraform IaC
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Principles & Patterns 2 guides

The foundational rules that make code maintainable — SOLID principles every developer must internalize, and all 23 Gang of Four patterns with real Java examples.

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SOLIDStart Here

SOLID Principles in Java: Single Responsibility to Dependency Inversion — with Code Examples

Beginner⏱ 13 min
GoFMost Read

Gang of Four Design Patterns: All 23 Patterns with Java Examples and When to Use Each

Intermediate⏱ 18 min
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Architecture & Cloud 3 guides

System-level thinking — how to build cloud-native apps with 12-Factor, decompose systems into microservice tiers, and manage infrastructure with Terraform.

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ArchitectureDeep Dive

7-Tier Microservice Architecture: API Gateway, Service Mesh, Data Layer and Beyond

Advanced⏱ 14 min
12-FactorPopular

12-Factor App Methodology: Build Scalable, Portable Cloud-Native Applications

Intermediate⏱ 11 min
Terraform

Getting Started with Terraform: Providers, State, Variables and Modules

Beginner⏱ 11 min

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