Building Scalable SaaS Architectures

Key architectural patterns for building software-as-a-service platforms that can handle millions of users.

Building Scalable SaaS Architectures

Building a SaaS platform that scales requires careful architectural decisions from day one.

Key Patterns

Multi-Tenancy Choose between: - Single database, shared schema - Simplest, but limited isolation - Single database, separate schemas - Good balance - Separate databases - Maximum isolation, highest complexity

Microservices vs Monolith Start with a modular monolith. Split into microservices only when you have clear scaling needs.

Event-Driven Architecture Use message queues for: - Decoupling services - Handling traffic spikes - Enabling async processing

Infrastructure Considerations

- Use managed databases (RDS, Cloud SQL) - Implement auto-scaling - Design for failure with circuit breakers