Chinese (Mandarin) AI Content Annotator — Singapore (C1 English Required)

OpenTrain is hiring contract AI Content Annotators to help evaluate and improve next-generation AI systems. In this role, you will review AI-generated outputs (primarily text; occasionally with image/video context), assess quality and factual accuracy, compare multiple responses, classify content, and flag safety/policy issues using detailed guidelines and rubrics. Tasks may also include writing and refining prompts and gold-standard responses for supervised fine-tuning and RLHF evaluation. We’re hiring multiple contractors for this engagement. Work is asynchronous with a flexible schedule, but you must be based in Singapore and able to meet accuracy and throughput targets consistently. Requirements Current residence in Singapore (required). Native-level proficiency in Mandarin Chinese (reading, writing, comprehension). English proficiency C1 or higher. Bachelor’s degree (any field). 1+ year of professional work experience. Strong critical thinking, fact-checking, and written communication skills. Ability to follow complex written guidelines and maintain high labeling accuracy. Comfortable reviewing sensitive or potentially disturbing content when required. Reliable computer and stable high-speed internet for remote work. Able to pass language/skills screening, calibration, and ongoing quality checks. Legally able to work as an independent contractor/freelancer in Singapore. Benefits Rate: USD $12/hour. Schedule: Flexible; minimum 15 hours/week (target 20+ hours/week based on task availability). Duration: 3–6 months with potential extension based on performance and project needs. Scope: Initial allocation ~120 hours; additional hours may be offered as work is available. Remote/work-from-home within Singapore; training, detailed rubrics, and calibration support provided. Opportunity to contribute to high-impact AI safety and quality efforts with a collaborative, mission-driven team.