Welo Global
Project Perseus | Data Labeling Associate - Portuguese (Brazil) Speakers (Human-in-the-Loop AI)
California +9 · On-site · Full-time · Posted Apr 22, 2026
- Location
- California
Sunnyvale, CA
San Francisco, CA
Seattle, WA
Redmond, Washington
Burlingame, CA
New York City Metropolitan Area
Los Angeles, CA
Washington, D.C.
Boston, MA - Experience
- 1–2 years of professional writing experience; 2+ years of relevant experience with GenAI safety considerations in data delivery.
- Education
- University degree (Bachelor’s or higher).
- Visa sponsorship
- Must be authorized to work in the U.S.; no visa sponsorship.
About the job
Evaluate and audit AI model outputs, document findings, and help improve evaluation frameworks and quality standards for Portuguese (Brazil) content.
What you'll do
- Evaluate AI outputs and provide structured feedback; identify patterns, edge cases, and failure modes.
- Review data and model behavior, apply guidelines, and flag when they miss real-world scenarios.
- Communicate performance insights, document findings, and help refine evaluation frameworks and quality standards.
What they ask for
- Native-level Portuguese (Brazil) proficiency and a university degree (Bachelor’s or higher).
- B2 or higher English proficiency.
- 1–2 years of professional writing experience.
- Strong understanding of GenAI safety considerations in data delivery, with 2+ years of relevant experience.
Nice to have
- Experience in data quality, QA, annotation, or analysis.
Pay
USD 34–34 per hour (base salary)
AI focus
Evaluate AI model outputs and behavior, identify failure modes, and contribute to improving evaluation frameworks and quality standards.
Model-written summary · the original posting is authoritative