Senior AI Generalist

Rex.zone; España; Remote; EUR 45,000 - 65,000; Full time

Job summary

Rex.zone in Spain offers a fully remote AI Generalist role focused on data labeling, RLHF evaluation, and prompt assessment to enhance large language model performance.

You will work across multilingual workflows, requiring strong command of English and Spanish, and contribute to high-quality labeling, QA, and content safety labeling for AI labs and startups. Remote-friendly opportunities span freelance to full-time.

Responsibilities

• Prompt evaluation for RLHF and model alignment.
• Content safety labeling and quality assurance.
• Craft high-quality responses for RLHF in multilingual settings (EN/ES).

Job description

About AI Generalist Roles At Rex.zone

Explore full-time remote AI Generalist jobs in Spain for 2026. Join Rex.zone to power AI training pipelines through data labeling, RLHF evaluation, and large language model evaluation.

Are you looking for remote AI Generalist jobs in Spain for 2026? At Rex.zone, we are hiring skilled professionals to drive model performance improvement and ensure training data quality. As an AI Generalist, your work directly impacts large language model evaluation, RLHF (Reinforcement Learning from Human Feedback), and prompt evaluation. Whether you are seeking freelance, contract, or full-time opportunities, this role bridges the gap between complex NLP tasks and AI training pipelines. Join our global team to provide high-quality data labeling, QA evaluation, and content safety labeling for the next generation of AI labs and tech startups.

Core Responsibilities and AI/ML Workflows

Candidates applying for AI Generalist jobs in Spain will engage in diverse AI/ML training workflows. Your daily tasks will include prompt evaluation, content safety labeling, and crafting high-quality responses for RLHF. You must possess a strong command of both English and Spanish to evaluate multilingual models accurately. Experience with data annotation vendors, tech startups, or BPOs is highly valued. We offer flexible remote work environments suitable for both entry-level and senior experts dedicated to advancing artificial intelligence.