Per-Market Rules Engine One platform, several countries, each with different tax forms, currency,...Per-Market Rules Engine One platform, several countries, each with different tax forms, currency,...
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Per-Market Rules Engine
One platform, several countries, each with different tax forms, currency, regional eligibility, and compliance requirements. The naive approach — country conditionals scattered through the codebase — becomes unmaintainable by the third market.
I moved market behavior into configuration resolved server-side at the point of use. Currency derives from the market record rather than user input. Regional eligibility matches through country-specific logic. Form requirements are selected per market at posting time.
The governing rule: anything a client can send is a value a client can get wrong, or manipulate. Money and compliance values are derived, never accepted.
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