Ninja responsible @tretton37
Johan Karlsson has been working with Xamarin since the days of MonoTouch and Mono for Android, and it all started with writing a game. He is a full-stack developer, currently focusing on mobile applications using Xamarin. But he has, in the past, worked a lot with ASP.NET MVC, Visual Basic.NET, and C#. Also, a whole bunch of databases in SQL Server have been created over the years.
Johan works at tretton37 in Sweden and has about 20 years in the trade of assembling ones and zeros.