English term
Brazil
Genuine dedication and professionalism
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Spanish to Portuguese
firm fixed price basis
Proposed translations
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
contrato de preço fixo garantido
Portuguese translations
Native in: Portuguese (Variants: Brazilian, Mozambican, Angolan, South African, European/Portugal, Cape Verdean)
Works in: English to Portuguese, Italian to Portuguese, Portuguese to English, and 4 more.
em base a preços fixos e firmes
Brazil
Digital Marketing & Game Localization.
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese
Com base no preço estabelecido na empresa
Will do!
Native in: Portuguese (Variant: European/Portugal)
Works in: English to Portuguese, French to Portuguese, German to Portuguese, and 1 more.
numa base de preço fixo firme
Firm-Fixed-Price (FFP)
Provides for a price that is not subject to any adjustment on the basis of the contractor’s cost experience in performing the contract. This type of contract places upon the contractor maximum risk and full responsibility for all costs and resulting profit or loss. Provides maximum incentive for the contractor to control costs, and imposes a minimum administrative burden on the customer.
Discussion
https://trianguloluz.com.br/onibus-interurbano-brasil/
http://www.esg.br/images/Monografias/2016/FONSECA.pdf
http://www.ferrolease.com.br/docs/Ferrolease_RFApresentacao1...
http://www.gbnnews.com.br/2009/10/entrevista-de-bengt-janer-...