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OpenTrain AI

Portuguese QA Annotator / Quality Reviewer (C1+ European Portuguese, B2+ English)

OpenTrain AI · Remote · Worldwide · Posted Jun 8, 2026

Apply for this job Hourly · $15/hr

About OpenTrain

OpenTrain is a centralized job board for data-labeling and AI-training roles. We aggregate projects from many AI companies and labeling platforms so you can discover relevant work in one place without searching dozens of sites.

Creating an OpenTrain account is free and applying takes only a few minutes.

  • OpenTrain lists contract and part-time AI training roles across many clients.
  • You apply through OpenTrain; projects vary in schedule, duration, and tooling.

About AI training work

AI training (also called data labeling, annotation, or human feedback) is the human side of building modern AI: people prepare, evaluate, and correct examples that models learn from.

This work is often remote and flexible, accessible without specialty credentials for many projects, and directly shapes how AI systems respond and behave.

  • Common tasks include rating model outputs, tagging text, transcribing, and correcting labels.
  • Projects may include reviewing sensitive content related to safety and require careful, consistent judgment.

The role

We are hiring Portuguese QA Annotators to review and score Portuguese-language data and generative AI outputs for quality, correctness, and guideline alignment.

This is project-based contract work (contractor, part-time) with flexible hours and a typical commitment of less than 20 hours per week. Pay is $15 USD per hour.

  • Data type: text. Label types: evaluation/rating and text generation review.
  • Labeling software: other web-based tools (you will use the project’s review interface).

What you'll do

You will audit completed labels and AI outputs, correct errors, and ensure work follows detailed guidelines and rubrics. You will also write concise reviewer notes and recommend workflow or guideline improvements.

  • Audit and score Portuguese-language labels and model responses for accuracy and guideline compliance.
  • Correct labeling errors and re-classify text where needed.
  • Tag entities and sentiment in text as required by project instructions.
  • Write clear, structured reviewer notes in European Portuguese.
  • Report or escalate potentially sensitive or safety-related content per guidelines.
  • Suggest improvements to guidelines and reviewer workflows when you spot recurring issues.

Requirements

All of the following are required for your application to be considered. These reflect the project’s language, location, experience, and technical needs.

  • Current residence in Portugal (applicants must live in Portugal).
  • Native or C1 proficiency in European Portuguese.
  • English at B2 level or higher.
  • At least 1 year of experience in data annotation, labeling, model evaluation, or QA.
  • Ability to follow detailed written guidelines and apply consistent rubrics.
  • Clear, constructive written feedback skills in European Portuguese.
  • Comfortable reviewing potentially sensitive or safety-related content.
  • Reliable computer and stable internet for web-based labeling tools.
  • Bachelor’s degree or higher preferred (not required).

Who should apply

This role suits detail-oriented reviewers with hands-on annotation or QA experience who want flexible, part-time contract work and enjoy improving AI outputs in Portuguese.

  • Experienced data annotators, QA reviewers, or linguistic evaluators with Portuguese language expertise.
  • People who can follow strict guidelines, keep consistent judgments, and write concise reviewer notes.
  • Applicants comfortable with occasional exposure to sensitive content and working independently as contractors.

How it works

Apply through OpenTrain by creating a free account and submitting your application. This is a contractor position paid at $15 USD per hour. Projects use web-based tools (labeled as "OTHER") and offer flexible scheduling under part-time contracts.

We will evaluate applicants based on language proficiency, relevant experience, and ability to provide clear, structured feedback. If selected, you will receive project-specific instructions and guidelines to follow when reviewing data.

  • Employment type: contractor, part-time; expected time commitment: less than 20 hours/week.
  • Pay type: hourly ($15 USD/hour).
  • Data handled: text — tasks focus on evaluation ratings and text-generation review.
  • You must meet all stated language, residency, and experience requirements to be eligible.