a whizz-kid

a young person who is very clever and successful They've taken on some financial whizz-kid who's going to sort all their problems out.

Name	Pronounced	Usage
Leevi	LE:-vee	Finnish
Colbert	KOL-bərt	English
Luz	LOOTH (Spanish), LOOS (Latin American Spanish)	Spanish
Ilta	EEL-tah	Finnish
Laurence (2)	lo-RAWNS	French
Lincoln	['liŋkən]