Újvári attended primary school in Kanjiža, completed high school and higher electrical engineer training in Subotica, and graduated from the "Mihajlo Pupin" Technical Faculty in Zrenjanin in 2017 with certification as a master information technology engineer.
He has been employed in the public sector since 2012 and has worked for Komunalac in Kanjiža as a clerk for personnel records and information technology.
[6] He resigned from the Kanjiža municipal council on 22 July 2022, as he could not hold a dual mandate as a parliamentarian and a member of a local executive.
[8] During this time, the VMSZ supported Serbia's government led by the Serbian Progressive Party (SNS) in the assembly.
[9] Re-election from this position was not a realistic prospect, and he was not elected when the list won six seats; his term ended when the new assembly convened in February 2024.