wunderkind

A child prodigy; a wonderchild.

A highly talented or gifted person, especially one who is successful at a young age.

• The downfall of Austria’s onetime political Wunderkind put a spotlight on the cozy, sometimes corrupt, relationship between right-wing populists and parts of the news media.
• When the verdict comes down, the transformation of the wunderkind founder of Theranos from black-clad genius to besuited milquetoast will be an integral part of the story.