Laravel SaaS architecture fails when billing logic lives in controllers and tenant scopes are forgotten on one query. GreeLogix structures apps around domains: Billing, Organizations, Workflows, Notifications — each with services, policies, and tests.
Core patterns
- Tenant global scopes on shared-schema models
- BillingService wrapping Cashier/Stripe
- Actions or single-purpose jobs for webhooks
- Filament for operator admin
- Events + listeners for side effects
- API layer separate from admin controllers
Monolith-first
Split into microservices only when proven bottlenecks exist. Most SaaS products never outgrow a well-structured Laravel monolith.