Pynyashko returned to his home country in 2017 to sign with Mynai in the national amateur circuit.[6] In his debut season with Mynai, he helped the club secure promotion to the professional third division by winning their group.[6][7] He would re-sign with Mynai for the following season and assisted the club in once again securing promotion by winning their group.[3][8] In his debut season in the professional circuit, he appeared in 26 matches and scored 3 goals.[9] In the 2019-2020 season, he would help Mynai secure another promotion this time to the premier league by winning the league championship.[3]
He was re-signed by the organization when they played in the premier league.[10] He made his debut in the Ukrainian Premier League for Mynai on 13 September 2020, playing as the start squad player in a winning home match against FC Oleksandriya.[11] In his debut season in the top tier level, he appeared in 22 matches and recorded 2 goals.[9] After the conclusion of the season, he departed from Mynai.[12][13]
Pynyashko left Mynai after four seasons in the summer of 2021 to rejoin his former club Uzhhorod in the Ukrainian second division.[14][15] In his single season with Uzhhorod, he appeared in 20 matches and left the club after the year's conclusion.[16]
In the summer of 2023, he had another spell abroad in the Canadian Soccer League with the FC Dynamo Toronto.[19][20] Pynyashko would record a goal against Weston United in his debut match on May 28, 2023.[21][22] He would help the club in finishing fourth in the standings.[23]
^"Нащадки Говерли…Чим живе команда Кополовця?" [Descendants of Hoverla... How does the Kopolovets team live?]. www.ua-football.com (in Ukrainian). 4 May 2018. Retrieved 22 February 2024.
^ abcKutsyk, Dima (19 July 2021). "Пиняшко - український Варді" [Pynashko is the Ukrainian Vardy]. ua.tribuna.com (in Russian). Retrieved 22 February 2024.
^Zoltán, Simon (6 December 2021). "Ukrajnából igazolhat a listavezető Barcika" [Barcika, The Leader of the List, Can Confirm from Ukraine]. nb1.hu (in Hungarian). Retrieved 20 February 2024.