Date of birth
Born in Metz, North-Eastern France, Sacha Bastien came through the ranks at CS Sedan Ardennes, before moving onto Stade de Reims. He made his first team debut for the Ligue 1 club in September 2014, against his hometown club FC Metz.
In 2017, Bastien moved to Bastia-Borgo in the Champiannat National, the third tier of French football. That season, he made three appearances for the first team, as well as three additional appearances for Bastia-Borgo II. The following season, Bastien joined US Granville, who also competed in the Championnat National 2, and made ten appearances for the club's first team.
In August 2019, Sacha Bastien signed for League Two Stevenage FC on a free transfer. He made his Stevenage debut a month later in the EFL Trophy, and made his first appearance in the league in a 1-0 win over Morecambe.
Two months later in October, Sacha Bastien was the hero in a 4-2 penalty shootout victory over Fulham Under 23s, after a 1-1 draw in the EFL Trophy. His next appearance for Stevenage was again the the EFL Trophy, in the Third Round. Bastien kept a clean sheet as Stevenage were victorious over League One Bristol Rovers with a 1-0 win.