Dee ihe na-esote paragraf a - Janssen gbara bọọlụ nke mbụ maka ndị otu egwuregwu bọọlụ nke Royal Dutch Football Association na 17 Machị 2010 na egwuregwu enyi nke U-15 mba egwuregwu megide England. N'afọ 2012, ọ bụ onye isi ndị otu Dutch U-17 n'egwuregwu ndị tozuru etozu maka 2012 UEFA Women's Under-17 Championship
o duziri otu ahụ, dịka onye isi, na ntozu maka 2013 UEFA Women's Under-19 Championship. N'afọ 2014, ya na ndị otu ya nwere ihe ịga nke ọma ịbanye na agba ikpeazụ nke 2014 UEFA Women's Under-19 Championship na Norway, ebe Netherlands meriri aha ahụ na nke mbụ ya na mmeri 1<unk>0 megide Spain. Janssen gbara egwuregwu ise niile na asọmpi ahụ.