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.