AI Training Experts - Experts - Valencia, Spain

Role overview A freelance opportunity is open for specialists who can train and assess modern AI models through structured human-in-the-loop work. Successful applicants join a participant pool where they complete paid tasks designed by external AI researchers and developers. The work is fully remote, self-paced, and treated as self-employment rather than a traditional employment contract.

Responsibilities - Analyze, edit, and write annotations used as training data for machine learning systems. - Evaluate the quality and behavior of AI model outputs and judge task performance. - Provide structured feedback that helps improve cutting-edge AI models. - Complete paid research tasks, some of which require up to one hour of uninterrupted focus, though many are shorter. - Pass an initial 10–15 minute skills verification test before being admitted to the participant pool.

Requirements - Demonstrable professional experience as an AI trainer or equivalent hands-on AI training task skills. - Strong attention to detail and the ability to concentrate on complex tasks for sustained periods. - A reliable, fast internet connection and access to a computer. - Comfort with self-employment, including self-declaring earnings. - A PayPal account to receive task-based payments.

Benefits and work setup - Hourly compensation reaching up to approximately $25 per task where the source rate applies. - Fully remote work from home with flexible hours. - Onboarding after assessment is quick, typically around 15 minutes. - Exposure to a wide range of AI research projects from external teams.