Having come through the club's youth ranks, he played for the reserve team before making his first-team debut in the Erovnuli Liga at 17 against Samtredia on the final day of the 2020 season.
[1] The next year, Mamageishvili lifted the first trophy after his team cruised to victory over Samgurali in the cup final.
[3] On 7 December 2023, Saburtalo claimed the second cup title following a narrow injury-time victory over Dinamo Batumi[4] with Mamageishvili playing full time.
[9] He played all six matches of the first and elite rounds of the 2022 UEFA European under-19 Championship qualifiers, scoring winners against Norway on 12 October 2022[10] and Croatia on 29 March 2023.
While his team reached the final stage of the competition via play-offs after beating Croatia,[13] Mamageishvili netted in a 3–0 home win against Moldova on 5 September 2023.