[4] After beginning his karting career at the comparatively late age of 14, Lubin made his single-seater debut in the F4 British Championship in 2020, partnering Alex Connor and Roman Bilinski as the only rookie at the TRS Arden Junior Team.

[15][16] Throughout the following rounds the Briton would continue scoring regular top-ten-finishes, before finishing off the campaign by taking a pair of podiums at the final two reversed-grid races of the year.

[19][20] Two runner-up finishes in the opening round at Estoril brought a strong start to the campaign, although Lubin would be unable to take a place on the rostrum until Race 1 in Hungary, by which stage he had fallen far behind championship leader and teammate Oliver Goethe.

[23][24] At the end of 2022, Lubin took his maiden step into sportscar racing, teaming up with Vector Sport during the post-season test of the FIA World Endurance Championship at the Bahrain Circuit.

[27][28] At the season opener in Sebring, Lubin and his teammates Filipe Albuquerque and Phil Hanson profited from a loss of drive from the initially leading sister car to end up finishing second, being beaten only by the non-championship #48 Jota entry.

[32] There, Lubin became involved in an incident which cost his team several laps of repair time, as he lost control whilst trying to overtake the GTE of Mikkel O. Pedersen on the run-off area after Tetre Rouge, causing his car to collide with the Porsche.