self-confident
US /ˌselfˈkɑːn.fɪ.dənt/
UK /ˌselfˈkɑːn.fɪ.dənt/

1.
feeling sure about your own ability or character
:
•
She is a very self-confident person.
•
He gave a self-confident presentation.
feeling sure about your own ability or character