As a member of the production duo Da Internz, Palacios is known for producing songs such as Big Sean's "Dance (A$$)" (2011), Rihanna's "Birthday Cake" (2011), and Nicki Minaj's "Anaconda" (2014).

[2] Later transferring to Columbia College Chicago, Palacios formed the idea for his production team, Da Internz, as a part of a class for his Business and Entrepreneurship degree.

[8] Palacios decided to start a solo career in 2014, under the moniker Enrique Dragon, releasing his first single Out Here which was later performed by Luke James on the FOX TV Show Star.

[3] In 2016 when he returned to Los Angeles, Palacios became a host for Beats 1 Radio,[7] and in 2018 started work as a co-host of the BET talk show Mancave,[10] as well as restarting his solo career, now under the name KOSINE (pronounced 'Co-sign'), with the song "Your World" featuring JoJo.

[7] In May 2021, he released his first debut EP album "Truth Serum" over streaming services along with starring in a 28-minute music video visual album/short film of the same name, loosely depicting his struggles of finding himself after 10 years of success in Hollywood, narrating a powerful message in how he persevered above it all.