A generalist software engineer can learn ${buzzword}

There are a lot of frustrating things when it comes to the hiring process. But by far the most frustrating thing is the obsession by recruiters to categorize engineers by a trendy framework, language or buzzword. React engineer, Java engineer, data engineer, Ruby ninja, and so forth. The problem with this sort of categorization is that it's trivial to learn another framework or language for a generalist. It takes a week or two to get up to speed in a ${buzzword} while it takes much longer to become proficient in programming fundamentals. Things like object oriented design, algorithms, systems design, architectural patterns, debugging, etc. In fact, it is likely that a strong generalist can outperform say a "Ruby ninja." A strong generalist can create reusuable modules that are easy to understand, maintain, test, and extend. Meanwhile, the ability to use a slightly shorter syntax in Ruby provides minimal benefits. I suspect the reason why this categorization exists is bec