Vlajić has written the poetry collections Krivo mi je (2005) Izložba reči (2008), A, da stvarno odemo na kafu? (2010), and Usud (2018), as well as the prose books Roaming (2007; published under a pseudonym), Raščupane muškatle (2009), and Baba Budimka i čuvar gumenog zamka (2012). She has also written a number of works for children, including Moja mama najlepše kuva (1998), Mama, je l' sutra opet ideš na posao? (2000), Zaistinska srpska bajka (2015), Slovarica, prirode čuvarica (2016), Šarena lica mojih ulica (2017), and ZEDSI, hibridni roman za tinejdžere, mlađe i starije (2019). Her works have been translated into Polish, English, Macedonian, Arabic, Portuguese, French, Romanian, Hebrew, and Slovenian.
She is a program editor for Matice iseljenika i Srba u regionu, poetry editor for the Belgrade publishing house ARTE, a co-founder of Beogradski čitač, and the founder and editor of the children's magazine Ekopedija. She is a member of the Association of Writers of Serbia, the Association of Writers of Vojvodina, and Mensa.[2]