<ul><li>Enforce tenant isolation and security measures at all layers of your SaaS platform by using middleware or policies to inject tenant context automatically.</li><li>Implement a clean architecture that decouples concerns using different layers such as Domain, Application, Infrastructure, and API to ensure business rules are pure and easily testable.</li><li>Utilize standards like OAuth2/OpenID Connect for authentication and authorization, and implement tenant-aware Role-Based Access Control (RBAC) or Attribute-Based Access Control (ABAC) for security.</li><li>Focus on observability by tagging logging, metrics, and tracing with tenant information and leverage tools like Serilog, OpenTelemetry, and Application Insights for better insights into platform performance.</li></ul>

SaaS Best Practices: 15 Essentials for Building Scalable, Secure, and Successful Platforms

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