In 2025, the large public clouds — Azure, AWS, and others — are already established infrastructures of services. The modern architecture is ubiquitous in the Cloud. But what about the move at scale under reliability and security conditions? And what about the role of AI in the modern architecture? This session follows up the concept developed in the last years and focuses on application and infrastructure architecture in the public cloud, architecture frameworks at Microsoft Azure and Amazon AWS, cloud native services, the landing zone concepts and other related topics.