Kalteva was drafted 107th overall in the 2002 NHL Entry Draft by the Colorado Avalanche. Kalteva joined Jokerit as a 16-year-old junior and played in the Junior A SM-liiga in 2000–01 earning a place in the Pohjola First All-Star Team. Kalteva gained the notice of the Avalanche after selection to the Finnish Jr. team for the World U18 Championships in 2002. Kalteva was also named in the Finnish World Junior Championships in 2003 and 2004, earning a bronze medal on each occasion.