Leon Rosenberg is an architect and DevOps expert who has been programming since 1997 and building portals since 2000. This document discusses DevOps and keeping applications live at runtime. It addresses how development creates business value but that value must be rolled out. It emphasizes automating deployment processes, using tools like Maven, Jenkins and Bash. It stresses the importance of a DevOps culture with trust between developers and operations and hiring the right developers. It also discusses monitoring, understanding production systems, and using techniques like chaos monkey testing to build reliability.