Post History
It's just a matter of style whether you want your "profile" to look as if it's written by you, or by someone else. Follow your own inclination unless you're doing it in a context where someone els...
Answer
#3: Attribution notice added
Source: https://writers.stackexchange.com/a/3387 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/
#2: Initial revision
It's just a matter of style whether you want your "profile" to look as if it's written by you, or by someone else. Follow your own inclination unless you're doing it in a context where someone else (the site, your employer, etc.) sets the rules. In which case do what they say. I'd be surprised if any Writers.SE members have refered to themselves as _He_ in their profiles. It seems a bit silly to do that if there's _no_ possibility that someone else wrote the profile. But I imagine people sometimes do this to give the impression they're so busy they don't have time to do the write-up themselves, but so important someone else will do it for them.