On 29 November 2018, Armini made his professional debut in a UEFA Europa League game against Apollon Limassol. He came on as a substitute for Felipe Caicedo as his team lost 2–0.[4] On 20 May 2019, Armini made his first Serie A appearance, coming into play instead of Luiz Felipe, who came off due to an injury, in a match against Bologna which ended in a 3–3 draw.[5][6]
Piacenza (loan)
On 10 August 2021 he joined Piacenza on loan.[7] He made his debut for the club on 29 August in a Serie C match against Trento which finished 0–0.[8]
With the Italy U17 team, Armini participated in the 2018 UEFA European Under-17 Championship in England. A starter in central defense throughout the tournament, he took part in all of his team's six games. He even appeared as team captain in the semi-final, which was won over Belgium.[11] Italy eventually lost to the Netherlands in the final after a penalty-shootout. Armini was subsequently included in the UEFA team of the tournament.[12]
With the under-18 team, Armini appeared as captain five times, and scored a goal against Slovenia in August 2018.[13]