Remote Bilingual AI Data Annotator & Evaluator (PT-BR/EN)

CNTXT AI; United States; Remote; USD 55,000 - 83,000; Full time

Job summary

CNTXT AI is hiring a fully remote contractor to support AI data and language projects on a flexible hourly basis. The role involves data annotation, LLM evaluation, content generation, and localization QA across multiple use cases.

You will apply senior-level Brazilian Portuguese localization and translation judgment alongside minimum C1 English proficiency to ensure terminology, tone, and cultural nuance are consistently accurate. A Bachelor's degree or higher is preferred.

Qualifications

• Native or near-native Brazilian Portuguese proficiency with strong writing and editing skills.
• Minimum C1 English proficiency (reading/writing) for interpreting prompts, source materials, and evaluation guidelines.
• Excellent editorial judgment in register, tone, punctuation, inclusivity, and cultural nuance, with extreme attention to detail.
• Ability to identify meaning drift, ambiguity, locale inconsistencies, and subtle errors, and to explain corrections clearly in writing.
• Ability to rigorously fact-check localized content (units, references, names, dates) using reliable sources and consistent reasoning.
• Ability to identify reasoning gaps, methodological errors, and unclear explanations even when language is fluent.
• Reliable, self-directed, and able to deliver consistent quality with clear communication and responsiveness across time zones.

Responsibilities

• Data annotation: labeling, classifying, and structuring documents, tables, and other content to support AI training datasets.
• LLM evaluation: reviewing AI-generated responses for accuracy, reasoning quality, coherence, and cultural/linguistic appropriateness.
• Content generation: writing high-quality prompts and model responses, or recording high-quality voice samples, to guide AI learning across diverse topics.
• Localization QA: ensuring terminology, tone, cultural nuance, and locale-specific details are consistently accurate across outputs.

Skills

Brazilian Portuguese

English proficiency

Editorial judgment

Localization QA

Research & fact-checking

Education

Bachelor's degree or higher

Tools

CAT tools

QA workflows

Job description

CNTXT AI is hiring a fully remote contractor to support AI data and language projects on a flexible hourly basis. The role involves data annotation, LLM evaluation, content generation, and localization QA across multiple use cases.

You will apply senior-level Brazilian Portuguese localization and translation judgment alongside minimum C1 English proficiency to ensure terminology, tone, and cultural nuance are consistently accurate. A Bachelor's degree or higher is preferred.