Is Bucky Barnes in age of ultron?

No, Bucky Barnes (the Winter Soldier) is not in Avengers: Age of Ultron.

* He is in Captain America: The Winter Soldier (2014), which takes place before Age of Ultron.

* He is then introduced to the Avengers at the end of Civil War (2016), which takes place after Age of Ultron.

So, while Bucky is part of the larger Marvel Cinematic Universe, his story isn't interwoven with the events of Age of Ultron.