When business logic is tightly coupled to third-party payment SDKs, CRM payloads, or ORM decorators, switching a vendor or writing fast unit tests becomes nearly impossible. Hexagonal Architecture (Ports and Adapters) and Clean Architecture keep your core domain logic pure, testable, and vendor-agnostic.
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Hexagonal & Polymorphic Architecture Guides on This Site
- Hexagonal Adapters in Go: Decoupling Core Logic from Third-Party Connectors: Designing Hexagonal Adapters in Go
- Polymorphic Payment Interfaces: Polymorphic Payments: A Unified Go Interface for CyberSource, HyperPay & Wallets
- Polymorphic Python Request Adapters: Structuring Reusable Request Adapters for Diverse Vendor APIs
- FastAPI Dependency Injection & Shared Core Libraries: FastAPI Dependency Injection Patterns & Designing a Shared Core Package for Python Microservices