Iusco grew up in Deva, Romania, a city famous for gymnastics. She was interested in sports and as her physique was not suited to gymnastics she focused on athletics instead. Her international debut came at the senior level when she was aged sixteen. At the 2013 European Athletics Indoor Championships she came 17th, failing to go beyond six metres. She came to prominence internationally with a gold medal double in the long jump and triple jump at the 2013 World Youth Championships in Athletics – becoming only the second athlete to achieve that feat, after her compatriot Cristine Spataru. She ended that year with personal bests of for the long jump and for the triple jump.