Germany- English & German AI Generalist Trainer; Remote

Rex.zone is hiring Germany-based English/German AI Generalist Trainers to support RLHF and large language model evaluation by assessing, ranking, and validating model outputs to improve training data quality and drive model performance improvement.

• Evaluate and rank model-generated outputs in English and German using defined rubrics and annotation guidelines
• Perform RLHF-style preference ranking and prompt evaluation to identify the best responses
• Conduct QA evaluation to ensure training data quality, consistency, and annotation guidelines compliance
• Write concise, evidence-based rationales explaining evaluation decisions
• Validate outputs for completeness, policy adherence, and content safety labeling requirements
• Flag ambiguous prompts, edge cases, and guideline gaps; propose clarifications
• Track errors, patterns, and failure modes that affect evaluation outcomes and model performance

• Based in Germany and able to work remotely on a full-time schedule
• Fluent in German and English (reading, writing, and nuance in both languages)
• Strong analytical reasoning and attention to detail; consistent guideline compliance
• Comfortable working with structured workflows, task queues, and quality targets
• Able to handle sensitive or safety-related content in line with labeling policies

• Experience with data labeling, LLM evaluation, prompt evaluation, or QA evaluation
• Familiarity with RLHF concepts, preference ranking, and common LLM failure modes
• Self-driven and reliable in a remote environment

$35–$40 USD per hour (hourly).

Feed salary range: $30–$50 USD per hour.