“I'm delighted to have signed for West Ham United.
“After spending the last 10 years in England playing for some great clubs, I now have a chance to play for another one.
"Alan Curbishley has given me the opportunity to join what I consider to be one of the biggest clubs in the country, and I am really happy to be here.
"Yes, I considered the fact that West Ham United are currently in the bottom three of the Premiership but even with that, I quickly decided that the opportunity was too good to turn down.” Boa Morte told the official site.
“Now I want to do everything I can to help West Ham climb the table. I am the type of player who will fight for the shirt, and I promise I will do that at West Ham.”