Born Mikayla Simpson, Koffee is a Jamaican reggae singer, songwriter, rapper, deejay and guitarist from Spanish Town in Jamaica. Her first musical inspirations stemmed from her mother's religious background. Koffee sang in her church choir, taught herself guitar at age 12 on an instrument borrowed from a friend, and began writing lyrics inspired by listening to reggae singer 'Protoje'. In 2016, she won her school talent show at "Ardenne High School" located in Kingston (Jamaica) without realizing that the informal show at which she performed in her school cafeteria had been an audition, and decided to learn music theory and vocal technique in her high school choir. When she performed at her school's talent show with other gifted artists in front of about 1,000 people. She indicated that the show gave her the first bit of confidence to perform and deliver music live. In 2017 Koffee released her first single "Legend" with just her voice and acoustic guitar, the song was a tribute to Jamaican sprinter Usain Bolt and became a viral Instagram hit after he mentioned it. Then, Koffee was introduced by 'Cocoa Tea' and her musical inspirations "Protoje" and "Chronixx" at reggae festival "the Rebel Salute".

In 2018, Jamaican reggae/dancehall singer, songwriter, and deejay Cocoa Tea brought her on stage at the 2018 Rebel Salute and Rototom Sunsplash in Jamaica and Spain respectively. Protoje asked her to perform with him. Chronixx invited her to join him a BBC Radio 1Xtra broadcast from Tuff Gong Studios, and she went on to tour with him in the UK at venues such as Bush Hall and at Alexandra Palace. She also signed with Columbia Records UK, and "RAPTURE", Her debut EP on the label, was released on March 14 which won a Grammy Award at the 62nd Annual Grammy Awards, making Koffee the youngest person (at 19 years old) and only woman to be awarded in the Best Reggae Album category.

Her "Throne" video, which takes viewers on a tour through her home town of Spanish Town, Jamaica, debuted on The Fader on 22 January 2019.

On 13 November 2019, Koffee was announced as an opening act for Harry Styles on select dates of the North American leg of his "2020 Love On Tour" and on 3 December as an opening act for the Latin American leg.

On 26 November 2019, Koffee released her first cross-over collaborative single "W", featuring hip-hop artist Gunna.

On 25 March 2022, Koffee will release her debut album. It's called Gifted, and you can watch the music video for its lead single "Pull Up" below.