In 2007, Vandy made her international debut at the European Junior Championships, where she achieved a seventh-place finish in the women's pole vault. She also set her personal best of 4.15 metres by winning the bronze medal at the Finnish Elite Series in Lahti, ahead of her teammate Minna Nikkanen, who flew over 4.05 metres. Shortly after the series, she continued to beat Nikkanen at the Sweden-match in Gothenburg, and most importantly, at the Finnish Indoor Championships in Joensuu, where she claimed her first ever career title in the pole vault.