Brazilian Portuguese Linguistic Expert
- Pay
- $40/hr
- Location
- Worldwide
- Type
- Contract
- Posted
- Nov 13, 2026
- Languages
- English, Portuguese
- Who can apply
- Only Albania, Algeria, Angola, Antigua and Barbuda, Argentina, Australia, Austria, Bahrain, Bangladesh, Belgium, Benin, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Canada, Chile, Colombia, Costa Rica, Croatia, Cyprus, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, El Salvador, Estonia, Finland, France, Gabon, Germany, Ghana, Greece, Guatemala, Guyana, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Ivory Coast, Jamaica, Japan, Jordan, Kuwait, Laos, Latvia, Lithuania, Luxembourg, Madagascar, Malaysia, Malta, Mauritius, Mexico, Monaco, Mongolia, Morocco, Mozambique, Namibia, Nepal, Netherlands, New Zealand, Nigeria, North Macedonia, Norway, Oman, Panama, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Rwanda, Saint Lucia, San Marino, Saudi Arabia, Senegal, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Taiwan, Tanzania, Thailand, Gambia, Trinidad and Tobago, Tunisia, Turkey, United Arab Emirates, United Kingdom, United States, Uruguay, Uzbekistan, Vietnam
Client: General Translation
Mercor is seeking experienced Brazilian Portuguese Linguistic Experts to join a cutting-edge AI research project in partnership with a leading research lab. This role centers on evaluating how effectively a large language model (LLM) performs in Brazilian Portuguese-language tasks and on curating high-quality Portuguese linguistic data to train and improve the model's understanding and generation capabilities.
Key Responsibilities:
Evaluate the quality and accuracy of LLM-generated Portuguese text across various use cases (e.g., translation, summarization, dialogue, grammar correction).
Edit, refine, or rewrite Portuguese content to meet linguistic and cultural standards for Brazil.
Annotate Portuguese text for grammatical, syntactic, and semantic features.
Identify model errors and language gaps, and collaborate with AI researchers to improve LLM performance.
Provide detailed linguistic feedback and analysis to guide ongoing model training efforts.
You're a strong fit if you have:
Native or near-native fluency in Brazilian Portuguese, with excellent command over grammar, syntax, and stylistics.
Professional experience in translation, editing, linguistic annotation, or NLP data work in Portuguese.
Strong understanding of Brazilian Portuguese nuances, regional variations, register, and context-appropriate usage, including how it differs from European Portuguese.
Professional fluency in English.
Interest in AI and LLM-driven language technologies (preferred but not required).
Excellent attention to detail and ability to spot subtle errors or unnatural phrasing.
Clear communication skills and experience working in distributed, remote teams.
Why Join
Contribute to cutting-edge AI research in partnership with a leading research lab.
Work on high-impact projects that directly support the development of advanced AI systems.
Gain hands-on exposure to state-of-the-art AI research and development.
Join a fast-moving project where your expertise and judgment can have a meaningful impact.
Quick answers
How much does the Brazilian Portuguese Linguistic Expert job at Mercor pay?
Mercor lists the pay as $40/hr. That is about 13% above the median of $35.50 an hour for Linguistics (SME) roles here (from 106 listings).
Who can apply for this AI training job?
Only Albania, Algeria, Angola, Antigua and Barbuda, Argentina, Australia, Austria, Bahrain, Bangladesh, Belgium, Benin, Bolivia, Bosnia and Herzegovina, Botswana, Brazil, Brunei, Bulgaria, Canada, Chile, Colombia, Costa Rica, Croatia, Cyprus, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, El Salvador, Estonia, Finland, France, Gabon, Germany, Ghana, Greece, Guatemala, Guyana, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Ivory Coast, Jamaica, Japan, Jordan, Kuwait, Laos, Latvia, Lithuania, Luxembourg, Madagascar, Malaysia, Malta, Mauritius, Mexico, Monaco, Mongolia, Morocco, Mozambique, Namibia, Nepal, Netherlands, New Zealand, Nigeria, North Macedonia, Norway, Oman, Panama, Paraguay, Peru, Philippines, Poland, Portugal, Qatar, Romania, Rwanda, Saint Lucia, San Marino, Saudi Arabia, Senegal, Serbia, Singapore, Slovakia, Slovenia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Taiwan, Tanzania, Thailand, Gambia, Trinidad and Tobago, Tunisia, Turkey, United Arab Emirates, United Kingdom, United States, Uruguay, Uzbekistan, Vietnam. The role is remote, so you work from home or anywhere you are allowed to apply from.
Is this job remote, and what kind of work is it?
Yes, it is remote. The engagement type is contract. Mercor hires for this role through its own application, which you reach from the Apply now button.
Which languages does this job need?
English, Portuguese.
How do I apply, and does it cost anything?
Select Apply now to go to Mercor's application. Legitimate AI training work never asks you to pay to apply or to buy equipment. AI Training Jobs does not charge applicants. The listing was posted Nov 13, 2026 and is refreshed daily; closed jobs are marked as such.
About Mercor
AI-powered hiring platform connecting expert contractors with AI companies for model training through RLHF and evaluation tasks.
277 open jobs here · median $80 an hour across 267 listings with pay
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