By . Craig Hope for MailOnline . Follow @CraigHope_DM . Middlesbrough have signed Holland Under-21 winger Yanic Wildschut from Heerenveen. The 22-year-old has penned a two-year contract at the Riverside Stadium, joining for a fee in the region of £600,000. Wildschut is a product of Ajax’s academy but never made a senior appearance for the club. Done deal: Middlesbrough have signed Holland Under-21 winger Yanic Wildschut from Heerenveen . He made his professional debut for FC Zwolle before moving to VVV-Venlo and then Heerenveen, spending the second half of last season on loan at ADO Den Haag. He has appeared 10 times for Holland Under-21s. Boro boss Aitor Karanka has now brought 10 players to Teesside this summer, including Chelsea striker Patrick Bamford who joined on a season-long loan on Friday. In the market: Middlesbrough boss Aitor Karanka has brought 10 players to Teesside this summer .
Yanic Wildschut is a product of Ajax's academy but never made it senior . 22-year-old penned two-year deal with Middlesbrough with optional third . Boro boss Aitor Karanka is thought to have spent £600,000 on Wildschut .