Portuguese Data Trainer - Remote

About the role

This remote, hourly‑paid contractor position focuses on improving the safety, reliability, and reasoning quality of advanced AI systems. You will evaluate AI‑generated content in Brazilian Portuguese and English, applying linguistic, cultural, and policy judgment to ensure outputs are accurate, logical, and aligned with safety guidelines.

Key responsibilities

• Review AI‑generated responses for accuracy, clarity, reasoning quality, and safety compliance.
• Identify logical, methodological, or conceptual errors and rate multiple responses based on correctness and policy adherence.
• Perform fact‑checking, validation, and red‑team adversarial testing to uncover vulnerabilities and unsafe behaviors.
• Document findings with clear, structured reasoning and reproducible decision paths.
• Apply and localize safety policies across Portuguese and English, recognizing slang, coded language, and cultural nuances.
• Escalate ambiguous cases using defined policy frameworks.

Required profile

• Bachelor’s degree or higher in Linguistics, Communications, Psychology, Law, Policy, Security Studies, or related field (or equivalent experience).
• Native or near‑native proficiency in Brazilian Portuguese and minimum C1 proficiency in English.
• 5+ years in Trust & Safety, content moderation, policy operations, compliance, investigations, or related functions.
• Proven experience in LLM red‑teaming / adversarial testing.

Required skills

• Experience with AI platforms such as ChatGPT, Gemini, Perplexity.
• Strong analytical writing and structured reasoning abilities.
• Ability to preserve meaning, intent, and severity across languages.
• High attention to detail and consistent application of safety guidelines.