I see good ethical reasons to be against AI, but I see no reasons why “resisting” would lead to anything but irrelevance. So I think this is terrible advice
This was not a thing one year ago, but now it is really part of the conversation. In our company the goal is to reduce by two thirds our expenses in digital services by focusing on self hosting and European alternatives. Is it inconvenient? Mildly so, but for most things there are alternatives available once you start looking into them
Honestly designing a parser is easy: just start using ANTLR and perhaps add later an AST layer. However if you do not want to go that I suggest looking in projectional editing, for example JetBrains MPS or Freon by Jos Warmer
Consider also that many companies promote job ads on LinkedIN or search candidates on LinkedIN. So even without the “submit your application” LinkedIN is pretty important to get hired, imho
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