Benoît Badiashile

Monaco

On 5 February 2018, Badiashile signed his first professional contract with Monaco. He made his professional debut on 11 November, in a 4–0 Ligue 1 loss to Paris Saint-Germain.

Chelsea

On 5 January 2023, Badiashile signed with Premier League club Chelsea on a seven-and-a-half-year contract for a transfer fee reported by The Guardian to be £32.7 million (€37 million). On 15 January 2023, Badiashile made his debut for Chelsea, starting against Crystal Palace in the Premier League. The French defender played the entire game and earned his new club a clean sheet as Chelsea won 1–0.

Loan to Napoli

On 22 August 2026, Badiashile joined Serie A club Napoli on a season-long loan, with an option to make the move permanent.

Badiashile is a senior international for France, having been a part various under-16 to under-21 teams since 2016. Badiashile received his first call-up to the France national team for two UEFA Nations League matches against Austria and Denmark in September 2022.

Benoît Ntambue Badiashile Mukinayi Baya was born on 26 March 2001 in Limoges, Haute-Vienne and is of Congolese descent.

Badiashile is the younger brother of Loïc Badiashile, who is also a professional footballer.