She studied at the prestigious Sibelius Academy under Eero Heinonen and later continued her artistic development in Paris with Konstantin Bogino.
Vaarni currently holds a tenured professorship at the Espoo Music Institute, where she also serves as Head of the Piano Department. A passionate educator, she regularly gives masterclasses at renowned institutions across Finland, Italy, and China, including the Central Conservatory of Music in Beijing and the Ningbo International Institute. Her students have won numerous prizes in national and international competitions for young pianists.
As a recording artist, Sanna Vaarni has received wide critical acclaim. Her 2022 album Illustrazioni (Stradivarius Music Label), dedicated to 20th-century Italian music, and her 2024 release Les yeux clos – Takemitsu & Messiaen have been praised by leading publications such as Fanfare, American Record Guide, Classic Today, Klassik Heute, Music Web International, PianoNews, Amadeus (Amadeus d’Oro), Click Magazine, and Pizzicato. In 2025, Stradivarius will release her new CD featuring works by Berio and Schubert.