For a year, Jaroševičius worked at the Zimin Furniture Factory as a designer. His designs were exhibited by the firm at the Paris Exhibition of 1900 and were awarded a silver medal. He worked as a teacher at a girls' gymnasium in Orlov, Vyatka Governorate in 1902–1905 and lectured at Kazan schools and the Kazan Polytechnic Institute in 1905–1920. Despite the long distance, Jaroševičius continued to be involved in Lithuanian cultural life. He continued to write to the Lithuanian press mostly on topics of art and Lithuanian folk art. His articles were published in "Lietuvių laikraštis", "Vilniaus žinios", "Lietuvos ūkininkas", "Viltis", "Aušrinė", and others. His writings inspired other Lithuanian artists, including Petras Rimša and Adomas Varnas, to study Lithuanian folk art. He also published two Lithuanian-language booklets, "Kam aš reikalingas?" (Who needs me?) in 1905 which expressed his nostalgia for the homeland and "Darbininkų rūpesniai ir vargai. (Brolių laiškai)" [Workers' Worries and Hardships. (Letters from the Brothers)] in 1913. He supported the idea of the First Exhibition of Lithuanian Art in 1907 and exhibited 19 of his works. He later participated in each annual exhibition of the Lithuanian Art Society. He illustrated books for children, including a primer by and a book of tales by Matas Šalčius. He also created vignettes and initials for the "Vairas" journal and created some of the first Lithuanian postcards.