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software architecture · SaaS · platform design

SaaS Platform Architecture

This SaaS platform architecture separates the client entry point from the services that manage identity, tenants and billing. The API gateway is the boundary for web and mobile traffic. Tenant and billing services share the records needed to operate subscriptions, while the event queue provides a place for asynchronous work. It is a useful starting point for explaining a multi-tenant product without drawing every endpoint or database table.

Tipo Diagrama de blocosNorma Ogata / standard controls textbook conventionMecanismo schematex-blockdiagramAtualizado 24/09/2026
SaaS Platform Architecture
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A solicitação

“Create a SaaS platform architecture with web and mobile users, an API gateway, identity, tenant and billing services, a tenant database, and an event queue.”

Depois, tenteAdd a notification service connected to the event queue.Change the tenant database to a multi-region database.
O que há neste desenho

Entenda as decisões por trás dele.

01Gateway boundary

Put client traffic through one API gateway.

02Tenant ownership

Keep tenant operations in a dedicated service.

03Shared records

Let tenant and billing services use the tenant database.

04Async work

Publish service events to a queue.

Use this view when defining the first shared services of a SaaS product.

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Perguntas frequentes

Dúvidas comuns

What should a SaaS architecture diagram show?

Show the client entry point, the main product services, the data stores they use and any asynchronous message path.

Why use an API gateway?

It gives clients one controlled entry point before requests reach internal services.

When is an event queue useful?

Use one for work that can happen after a request, such as notifications, billing updates or background processing.