Born into a family of musicians in 1985, Vassilena Serafimova is the first Bulgarian percussionist to be awarded the Second Prize of the 56th ARD International Music Competition in Munich and the First Prize of the Fifth World International Marimba Competition in Stuttgart. She won the Grand Prix of the 10th International Competition Music and Earth as a soloist as well as the First Prize as a member of the Percussion Ensemble Accent, founded by her parents Avgustina and Simeon Serafimov. She received the Young Musician of the Year Award in Bulgaria in 2008 as well as the First Prize of the Music Critics in the 18th International Festival of Central Europe in Slovakia.
In 2014, Vassilena made her debut in Carnegie Hall of New York. One year later, together with Thomas Enhco (piano), she was the first marimba player in history to perform at the French Awards Ceremony Victoires de la Musique. In 2016, the duo recorded their first album titled Funambules for Deutsche Grammophon.