Hello Sir, Im before work with the web services of a remittance transactions company for install on many banks around the world . So I have the experience working with web services , XML , WSDL , XSD , HTTP all this will be required for what do you need and by the way I can speak English and Spanish if is easier for you spanish because is very similary to portuguese.
Please let me know Im tried to by always on chat I your best choose on this project please let me help you with this.
Regards,