He co-founded internet service provider Dodo in 2001, which was bought out in 2013, and has interests in various other industries via his holding company LK Group.
The family emigrated when he was 11 years old as part of a wave of Jewish immigrants leaving the Soviet Union, living for six months in Ostia, Italy, before securing Australian visas.
He grew up in Melbourne's south-eastern suburbs, attending Murrumbeena High School before going on to study accounting at Victoria College in Prahran.
He moved from subdividing residential lots to building townhouses, later expanding to large apartment blocks in Footscray and Southbank.
[2] In 2015 he launched Capitol Grand, a 50-storey residential tower in South Yarra that would be reportedly be the tallest building in Melbourne outside of the central business district.
[8] The business grew rapidly with a focus on simplifying customer billing, including providing fixed-price plans and unlimited downloads.
[12][13] Kestelman debuted on the BRW Young Rich List in 2005 with Dodo co-founder Igor Gilenko, with a shared net worth estimated at A$87 million.