Data Labeling Associate, Portuguese (Brazil) — Human-in-the-Loop AI

Job overview

The Data Labeling Associate, Portuguese (Brazil) — Human-in-the-Loop AI role is 100% onsite, with hiring listed in New York City, Seattle, Bellevue, Redmond, San Francisco, Sunnyvale, Burlingame, Austin, Los Angeles, Washington, DC, Chicago, and Boston. The position pays $34 per hour and is a one-year W-2 full-time role with possible extension. Welo Data says applicants must be authorized to work in the U.S.; visa sponsorship is not available. The associate evaluates AI model outputs, reviews data and model behavior, and documents clear, actionable findings. The work uses human judgment to identify performance patterns and improve evaluation frameworks and quality standards.

What you'll do

• Evaluate AI model outputs and provide structured feedback
• audit data and model behavior
• identify patterns, edge cases, and failure modes
• flag guidelines that do not reflect real-world scenarios
• contribute to evaluation frameworks
• communicate performance insights
• participate in team discussions and calibrations
• document findings.

What we're looking for

Skills & competencies

data labeling associate

portuguese (brazil)

human-in-the-loop ai

ai model evaluation

data quality

onsite

$34 per hour

one-year contract

welo data

washington dc

seattle

austin

chicago

university degree required

Work arrangement

• Weekend coverage required

Benefits & perks

• Six paid vacation days
• two paid company holidays
• paid sick leave
• medical, dental, and vision insurance eligibility
• HSA
• 401(k)
• employee assistance program
• voluntary benefits
• meals, snacks, and commuter benefits.

Why this role

Requires native-level Portuguese (Brazil), B2 or higher English, a university degree, and onsite work in one of the listed cities. Benefits include paid leave, insurance options, 401(k), food, snacks, and commuter benefits.

About the employer

Welo Data is hiring for this role. Industry: All Other Professional, Scientific, and Technical Services. Sector: 54.