My name is Cláudio Esperança, I live in Portugal, and I am a software engineer.
On my free time I do some localization work for Mozilla products (http://mozilla.locamotion.org/accounts/cesperanc@/), services (https://localize.mozilla.org/accounts/cesperanc@/) and support (https://support.mozilla.org/pt-PT/user/cesperanc) to pt-PT.
I've been working with Mozilla on and off since 2007, but I've been very active in the Portuguese community in the last few months.