Ted Neward

Management-ese, C#, F#, .NET, Java, Groovy, Scala, JVM, Swift, iOS, Kotlin, Android, C++, JavaScript, TypeScript, NodeJS, Angular, React, Vue, Win32 GUI, architecture, design and design patterns, language design, virtual machine design, and a whole slew of more languages you've likely never heard of

How to build a classic dungeon-crawler engine that's open-ended; creating a new programming language with some constructs not found in others; building a scoring app for Hearts (and later Spades) on iOS/Android using Flutter;