Jakub Zajkowski is a Polish grappler and a jiu-jitsu black belt under Braulio Estima, who worked extensively with Marek Pietrzak of Copacabana BJJ (Poland) before joining the Gracie Barra affiliation (2017). Marked as one of the rising prospects in European Jiu-Jitsu by BJJ Heroes in 2016, Jakub Zajkowski went on to cement his reputation as one of the Old Continent's finest gi players through his outstanding performances in the International Brazilian Jiu-Jitsu Federation (IBJJF) circuit.