The song was written by the two artists, along its producers, J-Louis, Syk Sense, and Epikh Pro.

[3] It contains an interpolation of "Gettin' Some", with Shawnna, Too Short, Shorty B and Pee-Wee of The Dangerous Crew, and Xcel being credited as co-writers.

[5] "Backin' It Up" was previewed at a 2018 MTV Video Music Awards afterparty that Cardi attended.

[7] Directed by Kid Art, the song's music video shows Fontaine, Cardi B and their crew performing in illuminated floors and parking garages, wearing luxurious fabrics and jewels.

[9][10] Pardison Fontaine and Cardi B gave the first televised performance of the song at the 2018 BET Hip Hop Awards.