Welo Data is seeking an on-site Data Labeling Associate to evaluate AI model outputs, identify gaps, and perform audit-based reviews of data and model behavior. Candidates must have native-level Brazilian Portuguese proficiency, at least B2 English, a bachelor's degree or higher, and professional writing experience. The role is a 1-year full-time contract based on-site in select United States metropolitan areas, requiring valid U.S. work authorization.