Universal Music Publishing Group's
Jessica Rivera first heard about Grant in 2009 though Grant's lawyer Scott Felcher. On request, Grant sent Rivera some of his music, and the publishing executive later related her reactions to
HitQuarters: "It hit me right away that this dude had something different to bring to the table ... He wasn't just straight up hip-hop – his sound was very different and transcended genres." In 2011, Grant launched his record label,
Kidinakorner. In 2012, he co-wrote and co-produced multiple songs for
Christina Aguilera's seventh studio album
Lotus. In 2016, Grant released his first solo project as an artist. The single, "Not Easy" features
X Ambassadors,
Elle King and
Wiz Khalifa via Kidinakorner/
RCA Records. The track was written and produced by Alex da Kid for Kidinakorner,
Sam Harris,
Casey Harris,
Adam Levin, Elle King, and Wiz Khalifa. In 2017, Grant released his second track, "American Funeral" which was a co-written collaboration with Joseph Angel. In a
Music Connection magazine cover story from January 2015, Grant said, as a producer, he co-writes everything that he works on with the artists. On 27 August 2020, Grant released his first full-length project, a
jazz album titled
000 CHANNEL BLACK, under the
moniker by.ALEXANDER. The album features
guest appearances from
070 Shake,
Tanerélle,
Charles Bukowski,
Michèle Lamy,
Rainsford and
Irina Shayk. ==Other ventures==