The Brazilian racer began his single-seater career in 2017 in the Formula 4 UAE Championship, where he claimed a win and six podiums. The next year, seven victories saw him crowned French Formula 4 champion.

Two seasons in Formula Renault Eurocup followed, which included an overall second-place finish in 2020. His performance in the series earned him a place in FIA Formula 3, where he collected three wins and 11 podiums across a trio of seasons in the championship.

A former member of the Alpine Academy, Collet joined the Nissan Formula E team for Season 10 as their test and reserve driver. Making appearances in the Berlin and Misano rookie tests, the Brazilian was called up to substitute Oliver Rowland in Portland with the British title contender out with illness.