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Fusionplay Media

Business logic and architecture

We model the rules of the business before writing the code that enforces them, so systems stay clear and changeable.

Rules first, code second

Complex requirements become fragile software when the rules live only in code. We model the domain explicitly: the entities, states, permissions and calculations that define how your business works.

Architecture a team can reason about

Clear boundaries between systems, explicit contracts between services, and decisions recorded where the next engineer will find them. The result is architecture that is understood, not just inherited.

Refactoring without stopping the business

When logic has grown tangled, we untangle it in increments, with tests that pin down current behaviour before anything changes, so the business keeps running throughout.

A good fit when

  • 01The rules of the business live in people’s heads or in one giant file
  • 02Every change breaks something unexpected
  • 03You are about to scale and want the architecture right first

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