The 22-year-old DR Congo international has has signed a three year deal after impressing Rovers boss Mark Hughes whilst on trial at Ewood Park.
"I'm very grateful that I'm here, I'm very happy to be here," the 6'5" defender has said.
"It's a dream for me to play in England in this league, and at a great club like Blackburn, it is perfect for me."
"It was a good experience (in Germany), I think of all the leagues it is the one that is most similar to the English league.
"It is a very strong league but in England it is more intensive and stronger."