As a youth, he also played basketball with the junior teams of the club Paris Basket Racing.

After his college basketball career, Tillie returned to France, in May 2010, and signed a two-year deal with ASVEL.

In July 2012, he left France, and signed a two-year deal with UCAM Murcia of the Spanish Liga ACB.

[8] On 25 July 2018 Tillie signed a one-year deal with Herbalife Gran Canaria of the Liga ACB and the EuroLeague.

With France's senior national team, he has played at the 2014 FIBA Basketball World Cup, where he won a bronze medal, and at the 2016 Summer Olympics.