Biography third person or first person
Third person biography
The standard advice for writing a bio is to write in the third person (as though someone else is writing about you).
Biography examples
While some settings call for more "third person" narratives - like conference speakers' bios, authors' bios, etc - those are often written by a marketing person (a true "third person").
Bio for resume examples
depends on the platform.
Autobiography is written in what person
A main difference is that the biography is written by someone beside the subject, while an autobiographical narrative is a first-person account.