Born in
Kuopio, Tuominen has played for
Lahti,
Lahti Akatemia and
MP. In December 2019, Tuominen signed for Swedish club
Häcken, starting in the
2020 season. He was loaned out to Norwegian
Eliteserien side
Tromsø IL for the
2022 season. After spending six years abroad, Tuominen returned to Finland in January 2023 and signed with
Veikkausliiga club
KuPS on a deal for the
2023 Veikkausliiga season. He left the club at the end of the year. On 17 January 2024, he joined Polish club
Bruk-Bet Termalica Nieciecza in the second-tier
I liga on an eighteen-month contract. In March 2024, Tuominen underwent surgery on his meniscus, keeping him out of play for several months. Later he suffered another knee injury, after the club had pressured him to return to the pitch before he was fully game-fit. On 30 December, when he was close to returning to fitness, his contract was terminated. In March 2025, Tuominen returned to Finland and signed with
Inter Turku. ==International career==