Houssem Dellai is a Microsoft Most Valuable Professional (MVP) since 2013. He is also a Software Engineer working with startups, SMBs and giant companies. You might saw his work without you have noticed ! If you were looking for content on Xamarin, ASP.NET or Azure, chances are so high that you have checked his youtube channel or his blog posts on Microsoft MSDN Blog and CodeProject.
He is also a conference speaker and professional certified trainer who have trained more than 2000 students and professional developers. So, he knows where people stuck to learn new technologies. So, he can simplify the complicated concepts for beginners.