architecture-patterns

Master proven backend architecture patterns including Clean Architecture, Hexagonal Architecture, and Domain-Driven Design to build maintainable, testable, and scalable systems. Layers (dependency flows inward): Key Principles: Components: Benefits: Strategic Patterns: Tactical Patterns: - Designing new backend systems from scratch - Refactoring monolithic applications for better maintainability - Establishing architecture standards for your team - Migrating from tightly coupled to loosely coupled architectures - Implementing domain-driven design principles - Creating testable and mockable codebases - Planning microservices decomposition - Entities : Core business models - Use Cases : Application business rules - Interface Adapters : Controllers, presenters, gateways - Frameworks & Drivers : UI, database, external services - Dependencies point inward - Inner layers know nothing about outer layers - Business logic independent of frameworks - Testable without UI, database, or external services - Domain Core : Business logic - Ports : Interfaces defining interactions - Adapters : Implementations of ports (database, REST, message queue) - Swap implementations easily (mock for testing) - Technology-agnostic core - Clear separation of concerns - Bounded Contexts : Separate models for different domains - Context Mapping : How contexts relate - Ubiquitous Language : Shared terminology...