Remote Bilingual AI Data Annotator & Evaluator

CNTXT AI; Madrid; On-site; EUR 28,000 - 41,000; Part time

Job summary

CNTXT AI is seeking a senior localization contractor to perform data annotation, evaluation and content generation tasks for AI language projects. The role requires native Castilian Spanish and strong English, with precise linguistic judgement and cross-cultural sensitivity.

Applicants should have a higher degree and experience in localization, CAT tools, and QA workflows. This is a fully remote, hourly contractor position serving international projects and time zones.

Qualifications

• Bachelor's degree or higher in Translation, Linguistics, Localization, or related field.
• Native or near-native Castilian Spanish with strong writing/editing skills.
• Minimum C1 English proficiency for interpreting prompts and guidelines.
• Excellent editorial judgment in register, tone, inclusivity and nuance.
• Ability to identify drift, ambiguity, locale inconsistencies and explain corrections in writing.

Responsibilities

• Data annotation: labeling, classifying and structuring documents and content for AI training datasets.
• LLM evaluation: review AI-generated responses for accuracy, reasoning, coherence and cultural/linguistic appropriateness.
• Content generation: write prompts and model responses or record voice samples for AI learning.
• Localization QA: ensure terminology and locale details are accurate across outputs.

Skills

Castilian Spanish proficiency

English proficiency

Editorial judgment

Attention to detail

Communication skills

Education

Bachelor's degree or higher

Tools

CAT tools

QA workflows

Job description

CNTXT AI is seeking a senior localization contractor to perform data annotation, evaluation and content generation tasks for AI language projects. The role requires native Castilian Spanish and strong English, with precise linguistic judgement and cross-cultural sensitivity.

Applicants should have a higher degree and experience in localization, CAT tools, and QA workflows. This is a fully remote, hourly contractor position serving international projects and time zones.