To begin with, especially junior, specialist, learn your field.
It's easier to get promoted and once there ask to work on other things, but then specialise in that new area.
That way you become an expert generalist.
The "full stack developer" in web parlance.
Nothing stopping you learning other tech, just don't get distracted by the shiny too much, as your general work will suffer.
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We're a place where coders share, stay up-to-date and grow their careers.
To begin with, especially junior, specialist, learn your field.
It's easier to get promoted and once there ask to work on other things, but then specialise in that new area.
That way you become an expert generalist.
The "full stack developer" in web parlance.
Nothing stopping you learning other tech, just don't get distracted by the shiny too much, as your general work will suffer.