[3] Tanjy made his senior debut with topflight club Tidjikja, where he played for three years.
[6] In his first year with the club, he scored the game-winning goal in the title-clinching match against ASAC Concorde.
[9] In May 2018, he was named to the 22-man squad selected to play at the 2019 Africa U-23 Cup of Nations qualifiers.
[11] He made his senior international debut during the first group stage match against Morocco on 13 January, replacing Moussa Samba in the 77th minute of an eventual 4–0 defeat.
[3] On 9 October 2020, Tanjy scored his first senior international goal in a 2–1 friendly win over Sierra Leone.