Remote Portuguese AI Language Trainer & Evaluator

Invisible Technologies Inc.; United States; Remote; USD 8,300 - 90,000; Full time

Job summary

Invisible Technologies is seeking Portuguese (Brazil) language specialists to help shape the future of AI by testing and refining language models. You will focus on phonetics, morphology, syntax, semantics, pragmatics, and sociolinguistics, evaluating verb conjugation, noun-adjective agreement, sentence structure, word order, and colloquial expressions.

As a remote contractor, you will converse with the model, verify factual accuracy and logical soundness, document reproducible errors, and

Qualifications

• Master’s or PhD in Portuguese language or linguistics.
• Experience publishing or teaching in related field is a plus.
• Clear, metacognitive communication—showing your work—essential.

Responsibilities

• Converse with the model on language scenarios and evaluate performance.
• Verify factual accuracy and logical soundness of outputs.
• Capture reproducible error traces and document failures.
• Suggest improvements to prompt engineering and evaluation metrics.

Skills

Portuguese (BR) language

Phonetics

Morphology

Syntax

Semantics

Pragmatics

Sociolinguistics

Education

Master's in Portuguese

PhD in Linguistics

Job description

Invisible Technologies is seeking Portuguese (Brazil) language specialists to help shape the future of AI by testing and refining language models. You will focus on phonetics, morphology, syntax, semantics, pragmatics, and sociolinguistics, evaluating verb conjugation, noun-adjective agreement, sentence structure, word order, and colloquial expressions.

As a remote contractor, you will converse with the model, verify factual accuracy and logical soundness, document reproducible errors, and