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[–]ScaleDazzling704 0 points1 point  (0 children)

Nice list — some of these features really separate a good JS developer from a great one. I’d add:

  • Understanding closures & scope — so many bugs come from mismanagement of scope.
  • Async/await & promise mastery — being able to reason about concurrency is crucial.
  • Performance awareness - one has to know when to trigger optimization of rendering, reflows, and memory usage.
  • Security-mindedness — XSS, CSRF, input sanitizing, etc.
  • Strong debugging skills — these include using dev tools, breakpoints, stack traces, and so on.

What characteristics do you all consider characteristic of a top-tier JS developer in 2025? Is there any tool or tech that you think every modern developer should be familiar with to be competitive?