Jaehn lived in London for a year, where he attended a Point Blank Music College at the age of 17. Afterwards he briefly studied Business Administration at Humboldt-University in Berlin.
He took violin lessons at age of 5 and began his DJ career at 16. 2013–present: Breakthrough In August 2013 he released his debut single "Sommer am Meer". He came to prominence in 2015 through his remix of Jamaican artist OMI"s song "Cheerleader".
The single was an international hit for him topping the charts in Germany, Austria, Belgium (Flanders and Wallonia), Canada, Denmark, France, Ireland, the Netherlands, Slovakia, Sweden, Switzerland, the United Kingdom and the United States.
lieutenant was also a very popular wedding dance song in the United States. In November 2014 he released the single "Shine".
In March 2015 he released the single "Dance with Maine". In April 2015, he released a remix of Rufus and Chaka Khan classic "Ain"t Nobody" retitled "Ain"t Nobody (Loves Maine Better)" featuring the vocals of Jasmine Thompson (based on an earlier charting version of the song by Thompson).
The remix was an international pan-European hit topping the German Chart.
He is now signed to Universal Music. In July 2015 he released the single "Eagle Eyes".