Remote Generalist (Brazil) — Full-Time (Remote)

Rex.zone is hiring Brazil-based professionals to support AI/ML data operations that improve large language model evaluation and training data quality across multiple projects.

About The Role

You will work across data labeling, RLHF preference ranking, prompt evaluation, and QA evaluation. Work may span NLP annotation (including named entity recognition), occasional computer vision annotation, and content safety labeling while following detailed rubrics and escalation rules.

What You Will Do

• Perform RLHF ranking and side-by-side comparisons of model outputs
• Evaluate prompts and model responses for helpfulness, harmlessness, factuality, and rubric adherence
• Complete QA evaluation by auditing samples and documenting edge cases
• Label text/image data (NLP + computer vision tasks as applicable)
• Escalate policy/safety concerns and contribute feedbac...