Craig Clayton is a self-taught, senior iOS engineer at Adept Mobile, who specializes in building mobile experiences for NBA and NFL teams. He also volunteered as the organizer of the Suncoast iOS meetup group in the Tampa/St. Petersburg area for three years and prepared presentations and hands-on talks for this and other groups in the community. His Cocoa Academy online specializes in bringing to the market a diverse list of multi-level iOS courses, such as building apps and games.

Donny Wals is a passionate and curious iOS developer from Netherlands. With several years of experience in building apps and sharing knowledge, Donny is a respected member of the iOS development community. He enjoys delivering talks to share his knowledge and experiences with his peers. In addition to sharing knowledge, he loves learning more about iOS, Apple's frameworks, and development in general. This eagerness to learn has made him into a versatile iOS developer with the knowledge of several Apple frameworks and tools. During WWDC, you will often find Donny binge-watching the talks that Apple engineers deliver to introduce new features and frameworks.