[2] Solja won silver in the team event in the 2016 Summer Olympics in Rio de Janeiro.

Before the 2016 Summer Olympics in Rio de Janeiro, Solja posed together with swimmer Isabelle Härle, rower Julia Lier, cyclist Nadja Pries and injured pole vaulter Katharina Bauer for the German edition of Playboy.

She won the Cadet singles events at the 2008 and 2009 European Youth Championships, beating Bernadette Szőcs and Yana Noskova in the two finals, respectively.

[12][11] In 2017, Solja, alongside partner Fang Bo, won bronze in the mixed doubles at the World Championships in Düsseldorf, Germany.

[14] Solja played for German club TTC Berlin Eastside from 2014,[4] before taking a break from table tennis at the end of 2017,[15] and signing for TSV Langstadt in 2018.