European Portuguese/English Bilingual AI Data Annotator & Evaluator (Remote, Hourly Contractor)

CNTXT AI; Lisboa; Remote; EUR 34,000 - 55,000; Part time

Benefits offered by this job

Remote work

Flexible hours

Contract-based hourly

Job summary

CNTXT AI is seeking a senior-level European Portuguese localization contractor to support AI data and language projects on a flexible, hourly basis. You will perform localization QA, translation judgments, and content checks across prompts, datasets, and outputs, ensuring accuracy and cultural nuance.

Applicants should hold a Bachelor's degree in a related field, be native or near-native European Portuguese, and have strong English (C1).

Qualifications

• Bachelor's degree or higher in translation, linguistics, localization, or related field.
• Native or near-native European Portuguese with strong writing and editing skills.
• Minimum C1 English proficiency (reading/writing).
• Excellent editorial judgment on tone, punctuation, and cultural nuance.
• Strong attention to detail and ability to explain corrections clearly.
• Ability to fact-check localized content across sources.

Responsibilities

• Perform senior-level European Portuguese localization and translation quality judgments.
• Review prompts and outputs for accuracy, tone, and cultural appropriateness.
• Fact-check localized content for units, references, and dates across outputs.
• Identify meaning drift and locale inconsistencies; document corrections clearly.
• Collaborate across time zones and deliver consistent quality.

Skills

Localization

Translation quality

EU Portuguese

C1 English

Editorial judgment

Attention to detail

Time management

Education

Bachelor's degree in Translation/Localization

Tools

CAT tools

QA tooling

Job description

This is a fully remote, hourly contractor role supporting AI data and language projects on a project-based, flexible hour basis. Project scopes vary and may include:

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 (units, references, names, dates) are consistently accurate across outputs.

You will apply senior-level European Portuguese localization and translation judgment alongside minimum C1 English proficiency to ensure terminology, tone, and cultural nuance are consistently accurate across use cases.

Profile Requirements

Bachelor's degree or higher, preferably in Translation, Linguistics, Localization, Communications, or a related field.

Native or near-native European 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.

Preferred Experience

Professional localization or translation experience.

Previous experience with AI data training, annotation, or evaluation.

Familiarity with MQM/LQA concepts (severity, category, and root-cause thinking) for consistent quality decisions.

Familiarity with CAT tools and QA workflows.

About CNTXT AI

CNTXT AI builds artificial intelligence products and data solutions with a focus on making AI accurate, safe, and globally relevant for impact. Our work spans data services, custom AI solutions, and proprietary AI products, with deep expertise in Arabic-native and secure, sovereign solutions.