In 2017, he played for
TSS FC Rovers in the
Premier Development League. He would return to TSS FC for the 2019 season, scoring once in seven appearances. In 2020, he returned to Finland, signing with
Tampereen Pallo-Veikot (TPV) of the third tier
Kakkonen. In 2021, Yli-Hietanen approached
Reipas Lahti and went on trial with them, where he was recommended to the
top tier side
FC Lahti, where he signed a contract. He scored his first goal in a
2021 Finnish Cup match against
KTP on February 13. In 2022, he joined
KäPa in
Kakkonen. On 9 January 2023, it was announced that Yli-Hietanen had signed a 1+1 year contract with FC Haka in the Veikkauslliga. On 14 July 2023, Yli-Hietanen rejoined
Ykkönen club
KäPa on a contract for the rest of the season. On 15 January 2024, Yli-Hietanen signed with newly promoted
Veikkausliiga club
IF Gnistan on a one-year deal. ==Career statistics==