This matrix is way oversimplified and smells of a clueless HR hiring guide.<p>Some categories do not make sense, e.g. language knowledge.<p>Others have vastly varying impact. I'd someone who writes a blog or a book as useful as a person who is a major coauthor of a framework?<p>Algorithms list is strictly missing important exotic categories or creating your own from scratch, which requires hard math background.<p>And so on...