Multi-tenancy is a key feature of most modern SaaS platforms, allowing multiple customers (tenants) to share the same infrastructure while maintaining data separation. Building a multi-tenant architecture in 2024 requires careful planning to ensure both security and scalability. Key considerations include designing a database schema that supports tenant isolation, implementing role-based access controls, and ensuring each tenant has a customizable experience without affecting others. Using containerization with Kubernetes or Docker can help streamline resource allocation and scaling. Developers should also prioritize monitoring tenant usage and implementing automated billing systems to manage costs effectively.