Full Stack • Java • System Design • Cloud • AI Engineering

SaaS Platform System Design

A system design case study for a SaaS platform covering multi-tenancy, RBAC, data isolation, subscriptions, metering, and platform operations.

SaaS Platform System Design

This case study focuses on designing a SaaS platform with multi-tenancy, identity, RBAC, subscription management, usage metering, tenant isolation, and operational controls.

What This Article Covers

  • Scope and interview expectations
  • Tenant onboarding, user management, authorization, billing, metering, and admin workflows
  • Service boundaries for tenant, identity, billing, usage, audit, notification, and platform services
  • Data isolation models: shared schema, separate schema, separate database, and hybrid approaches
  • RBAC, audit logs, rate limits, tenant-level configuration, and feature flags
  • Reliability, observability, cost controls, and enterprise support operations

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