English to Brazilian-Portuguese Translation of an IM App & website

I am looking for a translator who can accurately translate the content of an instant messaging app and website from English to Brazilian-Portuguese. The project involves translating a certain number of words, which will be provided by the client. The ideal candidate should have experience in translation and a strong command of both English and Brazilian-Portuguese. The translator should also be familiar with the specific terminology and phrases used in the context of an instant messaging app and website. The desired tone of the translation should be either formal, informal, or neutral, depending on the client's preference.