Date of birth
Jaakko started his career in Finland as a youngster with a local team. He then joined the HJK Helsinki academy, playing for the reserve team Klubi 04 for the majority of his time in Scandinavia.
In October 2017, he made his debut and played his only senior game for Helsinki. It was a 3-2 defeat to Rovanieman Palloseura in the Veikkausliiga.
He joined Brentford on 13 January 2018, signing a two-and-a-half year contract with The Bees.