Ulf Magnus "Uffe" Krokfors was born on November 20, 1966, in Helsinki, Finland. He is a Finnish jazz bassist who gained prominence in 1989 and the late 1990s. His career began with his involvement in various groups led by Edward Vesala, notably as a member of Sound & Fury, contributing to their album Ode to the Death of Jazz. He also collaborated on Vesala's Klaani and later worked with Raoul Björkenheim’s jazz-rock group Krakatau. In 1990, he started playing with Markku Ounaskari. By 2003, he began composing music, resulting in the album Heart of a Bird with Iro Haarla and Rasmus Korsström. This collaboration led to the formation of the improvisational ensemble Loco Motife, which released Penguin Beguine. Additionally, he formed the Juhani Aaltonen Trio, releasing albums such as Mother Tongue in 2003 and Illusion of a Ballad in 2006. He received the Finnish Jazz Association's Yrjö Award in 2015.