architecture-paradigm-hexagonalv1.9.17

A financial institution redesigns its core banking system to isolate business logic for account management, loan processing, and transaction validation from databases and messaging systems. This enables independent upgrades of infrastructure without altering domain rules.

A health tech company builds a platform that aggregates patient data from multiple EHR systems using hexagonal architecture. Adapters for each EHR vendor implement common ports, allowing the core care coordination logic to remain unchanged when adding new sources.

An online retailer refactors its checkout service to use hexagonal architecture, separating payment processing, inventory checking, and shipping calculation into ports and adapters. This allows swapping payment gateways or adding new shipping carriers with minimal core impact.

A smart home company develops a backend that controls diverse IoT devices using hexagonal architecture. Ports abstract device communication protocols, enabling security team to unit test safety rules without real hardware and to support new device families via new adapters.

A government agency wraps a legacy mainframe system behind a port interface, then implements an adapter that gradually replaces calls to the mainframe with a modern microservice. This allows the agency to modernize incrementally while keeping the core domain stable.

Offer a foundational hexagonal core that handles generic domain logic for a vertical (e.g., property management), while charging per adapter integration (CRM, payment, etc.) or per tenant.

Build a product that connects multiple third-party systems (e.g., e-commerce, accounting, shipping) using a hexagonal core. Clients pay for the number of integrated adapters and data transformation volume.

Consulting firm helps clients adopt hexagonal architecture and builds custom adapters for their specific infrastructure. Revenue from architecture assessment, training, and adapter development.