The Production SaaS Architecture Checklist
Building a SaaS product that handles real customer data requires more than a frontend and a database. This checklist covers multi-tenancy, authentication, subscription billing, and telemetry.
Table of Contents
1. Multi-Tenant Data Isolation Strategy
Choose your multi-tenant isolation model early. For most B2B SaaS applications, PostgreSQL Row Level Security (RLS) provides the ideal balance of ironclad tenant isolation and straightforward operational maintenance.
2. Subscription & Usage-Based Billing Engine
Decouple your product's authorization checks from payment processing. Ensure you handle payment webhooks asynchronously with idempotency keys so network drops never cause duplicate billing or missed plan upgrades.
3. Comprehensive Telemetry & Observability
Incorporate structured logging, error tracking (Sentry), and performance metrics from day one. You should know when an error occurs before your customer contacts support.
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