It's extremely subjective. What does it mean to be an expert at CSS? Or Angular? I guess you could compile some sort of checklist for each item on your tech stack, but then again, everyone would come up with something different - there's no way to compare you against someone else based on that.
It's much better to "Used technology X for Y years at company Z". Link to these projects you worked on (if possible).
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It's extremely subjective. What does it mean to be an expert at CSS? Or Angular? I guess you could compile some sort of checklist for each item on your tech stack, but then again, everyone would come up with something different - there's no way to compare you against someone else based on that.
It's much better to "Used technology X for Y years at company Z". Link to these projects you worked on (if possible).