This is particularly relevant for companies who hire full-stack developers. Inevitably you will have some with better front end or backend or DB etc skills than others, this does not (or should not) determine their "level". While you may be "junior" at one thing you could be "senior" at another. In this scenario labels become not only useless but harmful to the team.
agreed, full stack devs are likely to have T shaped skills and labelling incorrectly across the stack skills totally feeds into this.
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