In this video, I’m breaking down the most important microservice architecture patterns for SaaS. I discuss why monoliths quickly reach their limits at scale and how microservices provide resilience, tenant isolation, and flexibility. I walk through the foundations, including API gateways and database-per-service, then dive into resilience with circuit breakers and service discovery, multi-tenancy models, event-driven workflows, and security and observability practices that enterprises demand. Finally, I explain how to migrate from monolith to microservices step by step, so SaaS platforms can grow without losing stability.