International Airtime Integration
A secure prepaid airtime flow with international phone validation, operator detection, amount handling, and transaction feedback.
Read case studySubscription platform integration
A set of payment, subscription, and single-sign-on workflows connecting a community platform with a Laravel SaaS application.
01 · The problem
Users needed a seamless path between products while subscription access depended on multiple payment providers and asynchronous status updates.
02 · The solution
I created signed SSO checks, plan mapping, transaction state handling, provider webhooks, and access-control rules. The implementation emphasized idempotency, signature validation, failure recovery, and clear separation between identity and billing concerns.
03 · Key functionality
Cross-application SSO and account matching.
Multiple checkout and cryptocurrency payment providers.
Webhook verification and idempotent status updates.
Plan entitlements and subscription access control.
Sandbox and production configuration separation.
04 · Constraints
Preventing duplicated webhook processing.
Reconciling user identity across independent applications.
Representing provider-specific states in one internal model.
05 · System view
06 · Interactive system motion
This abstract simulation turns the architecture above into a small spring-and-collision system. Move or press inside the canvas to disturb it. It is a systems visualization, not customer footage or a product screenshot.
07 · Result
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