Spendlhofer made his debut in the
Serie A with
Inter Milan on 12 May 2013 against
Genoa, ended without goals. On 9 May 2018, he played as
Sturm Graz best
Red Bull Salzburg in extra time to win the
2017–18 Austrian Cup. On 2 October 2020, Spendlhofer returned to Italy and signed a two-year contract with
Ascoli. On 9 February 2021, he joined
Israeli Premier League side
Bnei Sakhnin on loan for the rest of the season. In June 2022, Spendlhofer signed for
Maccabi Bnei Reineh. On 24 August 2023, he signed a two-year contract with Polish
I liga side
Bruk-Bet Termalica Nieciecza. On 1 July 2025, Spendlhofer returned to Austria to join
TSV Hartberg on a one-year deal. ==Honours==