On 23 December 2020, he made his debut for the club against Saif, coming on as a substitute for Azad Hossain in the 80th minute during the 2020 Federation Cup.

He went onto to make a total of 18 appearances in the league season, which earned him a senior national team call up later that year.

[6] His transfer to the Dhanmondi based club came with controversy, as Uttar Baridhara filed an official complaint, accusing him of taking advanced payments.

[7] Mitul made five appearances in the league that year under coach Juan Manuel Martínez Sáez, however, following the appointment of Joseph Afusi, he spent the remainder of the season as a substitute.

[16] On 2 November 2021, he started the last group stage match against Saudi Arabia U23 which concluded in a 3–0 defeat and during the game Mitul was replaced by goalkeeper Pappu Hossain in the first half.

[24][25][26][27] On 12 October 2023, Mitul made his official debut for Bangladesh in their 1–1 draw with Maldives in the 2026 FIFA World Cup qualification – AFC first round.