Buuxi weedha soo socota: Janssen wuxuu markii ugu horreysay u ciyaaray xulashada Junior ee Royal Dutch Football Association bishii Maarso 17, 2010 kulan saaxiibtinimo oo ay la ciyaareen xulka qaranka U-15 ee England. Sanadkii 2012, waxay kabtan u ahayd kooxda Holland ee U-17 ciyaarihii isreeb-reebka ee tartanka.
2012 UEFA Women's Under-17 Championship sidoo kale wuxuu hogaamiyay kooxda, kabtan ahaan, isreebreebka UEFA Women's Under-19 Championship ee 2013. Sanadkii 2014, waxay ku guuleysatay kooxdeeda inay u soo baxdo wareegga ugu dambeeya ee Koobka Haweenka UEFA ee ka hooseeya 19 ee 2014 ee Norway, halkaas oo Nederland ay ku guuleysatay horyaalka markii ugu horreysay iyada oo 1-0 kaga badisay Spain. Janssen wuxuu ciyaaray dhamaan shantii kulan ee tartanka.