Rubuta ci gaba don wannan sakin layi - Janssen ya buga wasan farko a karo na farko don zabin Junior na Royal Dutch Football Association a ranar 17 ga Maris 2010 a wasan sada zumunci na U-15 na kasa da Ingila. A shekarar 2012, ta kasance kyaftin din kungiyar kwallon kafa ta Dutch ta U-17 a wasannin neman shiga gasar cin kofin kwallon kafa ta mata ta shekara ta 2012
kuma ya jagoranci tawagar, a matsayin kyaftin, a cancantar gasar zakarun Turai ta mata ta shekara ta 2013. A cikin 2014, ta yi nasara tare da tawagarta don cancanta zuwa zagaye na karshe na gasar zakarun Turai ta mata na shekara ta 2014 a Norway, inda Netherlands ta lashe taken a karon farko tare da nasarar 1<unk>0 a kan Spain. Janssen ya buga wasanni biyar a gasar.