Modern cloud-native systems often fall victim to their own scale. A single misconfigured deployment or localized infrastructure degradation can quickly cascade across an entire distributed system, compromising the service for all users simultaneously. When architectural boundaries fail to contain faults, engineering teams face catastrophic service level agreement breaches and prolonged recovery times (Smith & Jones, 2023). The definitive solution to this vulnerability is Cellular Architecture. By partitioning the system into isolated, self-contained units of deployment known as cells, we strictly limit the blast radius of any failure. Implementing this pattern across Amazon Web Services and Microsoft Azure ensures that a tenant workload, such as a housing cooperative management platform, remains operational even during a complete regional or provider-level outage.…