Payment Gateway Integrator

A supermarket chain with five branches was operating a separate payment terminal setup for each payment method — card through one provider, MTN Mobile Money through a USSD flow, and Orange Money through a third channel. Reconciliation was a daily manual exercise, and customers occasionally abandoned purchases when their preferred payment method failed. AstraWorks designed and built a unified payment gateway that sits as a middleware layer, presenting a single clean checkout experience to customers while routing to the appropriate payment network behind the scenes.

We built a payment orchestration service with a unified API surface that abstracts all three providers. Internally, each provider has an isolated adapter that handles its specific contract. A transaction state machine ensures every payment reaches a definitive completed or failed state — even when a provider webhook arrives late. The client's point-of-sale systems and online store call a single endpoint; the gateway handles routing, retry logic, and idempotency. A back-office dashboard lets finance staff see all transactions, statuses, and daily reconciliation reports across all providers in one view.