As a portuguese citizen, do I need a VISA to work in Brazil? Where can I find more information on this?

The best thing to do is contact the Brazilian Embassy/Consulate in London

Brazil has reciprocal rights when it comes to immigration policy. Do Brazilians need a visa to work in Portugal? If yes, then so do you.

Yes. see below: Brazil Who requires a visa? VISA Required by all except the following: (a) nationals mentioned under passport exemptions below; (b) nationals of EU countries for touristic stays of up to 90 days; (c) nationals of Andorra, Bahamas, Barbados, Bolivia, Colombia, Costa Rica, Ecuador, Iceland, Liechtenstein, Monaco, Morocco, Namibia, Norway, Peru, Philippines, San Marino, Slovenia, South Africa, Surinam, Switzerland, Trinidad & Tobago, Vatican City and Venezuela for touristic stays of up to 90 days; (d) transit passengers continuing their journey to a third country by the same or first connecting flight, provided holding onward documentation and not leaving the airport. Note: (a) Visa exemptions mentioned above are for touristic purposes only. All those travelling on business do need a visa (except nationals of the UK who will be granted an appropriate business visa on arrival, provided holding a return or onward ticket and proof of sufficient funds to cover duration of stay. The length of stay permitted is normally up to 90 days but can be extended to a maximum of 180 days). (b) All travellers must be in possession of onward or return tickets and sufficient funds to cover their stay. PASSPORT Passports valid for at least 6 months from date of entry required by all except nationals of Argentina, Chile, Paraguay and Uruguay arriving in Brazil directly from their own countries and holding a national identity card. Required documents for visa: Tourist/Transit: (a) Valid passport. (b) Application form. (c) Proof of sufficient funds to cover duration of stay. (d) 1 passport-size photo. (e) Return or onward tickets (photocopy, or letter from carrier giving flight details). (f) Fee (paid in cash or with a Giro slip obtainable from the Consulate). Business: (a)-(f) and, (g) Letter from applicant's company stating the purpose and duration of the visit and confirming financial responsibility for the applicant. (Visas will not be granted if the passport expires within 6 months.) Note: For postal applications, travellers should also submit a stamped, self-addressed envelope and a written request stating nationality, status and length of residence in the UK (where applicable) and validity of the British visa (where applicable). Time required to issue visa: Depends on nationality. Usually 3 (for permanent UK residents); longer by post. Costs of visa: Tourist and Business: cost varies according to nationality. For permanent residents of the UK the fee is £16. Other prices, based on reciprocity, are £24 (for nationals of Korea (Rep of), Mexico and Poland); £28 (for ntionals of Australia); £32 (for nationals of Canada and Nigeria); £36 (for nationals of the USA); and £40 (for nationals of Japan and Russian Federation). Transit: contact the Consulate for details of cost. Note: Postal applications cost an additional £8. Validity of visa: 90 days from date of issue. Tourist visas can be used for multiple entry within the period of validity. For an extension of the 3-month Tourist visa, apply in Brazil. Comment: Persons under 18 years of age when not accompanied by both parents must have a birth certificate (an original or photocopy). This must be in Portuguese, English, Spanish or French, otherwise an official translation must be presented as well. When travelling alone or with one parent, a declaration from the absent parent(s) must be presented authorising the journey and giving the name and address of the person in Brazil who will be responsible for the minor. In the case of divorced or deceased parents, papers attesting to full custody must be presented. Restricted entry: Holders of passports issued by Central African Republic, Comoros, Korea (DPR) and Taiwan will not be allowed entry to Brazil unless they are holding a Laissez-Passer issued by the Brazilian authorities.