Tanga made his senior debut for Leyton Orient in the EFL Trophy in the 1–0 win at home to Southampton U21 on 14 September 2021, coming on as a second-half substitute for Callum Reilly.[2] He later appeared in the 0–0 draw with Milton Keynes Dons in the same competition, again as a substitute, this time for Tyrese Omotoye. Orient lost the match after a penalty shoot-out.[3]
On 14 January 2022, Leyton Orient confirmed Tanga had gone on loan to Sutton Common Rovers,[4] where he won Rovers' Player of the Month award for February.[5] On his return to Orient, he made his league debut as a late substitute for Adam Thompson in the 2–2 draw at Colchester United.[6]
In June 2022, Tanga signed his first professional contract with Orient, alongside defender Harrison Sodje.[5] On 19 August 2022, Tanga signed for Royston Town on a 28-day loan.[7] In October 2022, Tanga rejoined Sutton Common Rovers on loan.[8] In November 2022, Tanga joined Cray Wanderers on loan.[9] Tanga won the players player of the season award at Cray.
Following the conclusion of the 2023–24 season, Tanga departed Leyton Orient on a free transfer.[10]
In July 2024, Tanga joined National League side Ebbsfleet United, the club fighting off competition from a number of other sides at the level.[11]