Meridial Marketplace (by Invisible) is seeking an experienced Korean voice acting professional for a freelance AI trainer project to help train next-generation AI speech and language models. The contractor will record scripted Korean material, assess AI-generated outputs for linguistic accuracy and naturalness, annotate errors, and provide expert feedback on pronunciation, tone, pacing and emotional expression to strengthen voice models, collaborating with the team to refine prompts, evaluation methods, and voice design guidelines. Fluency in Korean is required, along with demonstrated experience in professional voice acting, dubbing, narration or related performance work; experience in training, coaching or linguistic annotation is a plus. Clear communication skills and attention to detail are essential, and a high-quality recording setup including a reliable microphone and a quiet environment is required. This is a fully remote contract role with a pay range of $6 to $65 per hour determined by experience, expertise and geographic location; the contractor supplies their own secure computer, microphone, recording setup and stable internet, and company-sponsored benefits such as health insurance and PTO do not apply.