The Algeria midfielder is the latest arrival tasked with turning fortunes around after Inter returned a disappointing ninth-placed Serie A finish last term.
Taider, who agreed a four-year deal, has made his name as a hard-working midfielder and has vowed to do all he can to return the Nerazzurri to the top of Italian football.
"Without hard work you don't achieve anything, that's why it's important to work every day and improve along with the coach and the club that has shown so much faith in me," he told the club's Inter Channel.
"Our dream is to win everything. In the past the club won everything and the young players here now will do their utmost to give their all.
"I'm very happy to be here at Inter. Everyone knows this is a fantastic club. I'm overjoyed."