In my mind (aka experience) the job ad goes like this. Frontend? You must know JavaScript plus Angular/react/whatever. Fullstack? Again Javascript but also node

In my mind (aka experience) the job ad goes like this. Frontend? You must know JavaScript plus Angular/react/whatever. Fullstack? Again Javascript but also node.js, maybe some devops. Backend? Java or Rust or such plus definitely devops. So instead of listing technologies and be clear, they'd rather use fancy-schmancy made-up names.