Learn the five fundamental principles that define modern application development in this 56-minute conference talk from Platform Engineering. Explore how contemporary software applications should be designed, operated, and delivered to meet today's technological demands and user expectations. Discover best practices for application architecture, operational excellence, design methodologies, and delivery strategies that enable scalable, maintainable, and efficient modern applications. Gain insights into the key considerations that distinguish modern apps from traditional software approaches, covering the complete lifecycle from initial design concepts through operational deployment and ongoing maintenance.