She first achieved mainstream attention due to her 2015 single "Naucz mnie" (Teach me), which occupied the number-one position on the Polish singles chart for six consecutive weeks, and was certified diamond by the Polish Society of the Phonographic Industry (ZPAV).

[2] After being signed to Universal Music Polska, Sarsa released her debut single "Naucz mnie" (Teach me) on 30 April 2015.

The song peaked at number-one on the Polish singles chart and stayed there for six weeks.

[3][4] From 17–18 July, she represented Poland at the Baltic Song Contest, performing "Naucz mnie" and "Indiana".

[8] She was nominated for Best Polish Act at the 2015 MTV Europe Music Awards, but lost to Margaret.