Chinese (Mandarin - Native) AI Content Annotator (C1 English Required)

About OpenTrain

OpenTrain aggregates data-labeling and AI-training jobs from many companies and platforms into one searchable place so you can discover this kind of work without hunting dozens of sites.

• Creating an OpenTrain account is free and applying usually takes only a few minutes.
• OpenTrain lists project-based and contractor opportunities across AI training specialties.

About AI training work (human side of AI)

AI models learn from examples prepared and reviewed by people. As a content annotator you help shape model behavior by evaluating outputs, labeling examples, and flagging safety or factual issues—work that directly improves generative AI quality and safety.

• Typical tasks include rating model responses, classifying content, fact-checking, and reviewing for policy or safety concerns.
• Projects can be remote and flexible; some require domain-specific skills while many are open to entry-level contributors with strong language ability and attention to detail.

The role

OpenTrain AI is hiring Mandarin (native) content annotators to perform generative AI content quality evaluation on a project basis. This is a remote contractor role for residents of Singapore, with part-time hours and variable task availability by project.

• Employment type: Contractor, Part-time (project-based freelance).
• Location: Must currently reside in Singapore; remote work from Singapore only.
• Schedule: 20+ hours per week (minimum), actual hours vary by project and task availability.
• Experience level: Entry level (requires at least 1 year of professional experience).

What you'll do

You'll review AI outputs—primarily text, with occasional images or videos—following detailed guidelines to assess quality, factual accuracy, safety, and usefulness. Tasks require careful judgment, consistency, and clear written feedback when required.

• Rate quality and factual accuracy of model-generated responses.
• Compare multiple responses and identify the best or most accurate option.
• Classify and label content according to project taxonomies and instructions.
• Write or refine prompt responses (SFT-style) and perform question answering tasks when requested.
• Participate in red-teaming exercises and RLHF-style evaluation to flag problematic outputs.
• Flag safety, policy violations, or sensitive content and provide explanatory notes.

Requirements

You must meet all of the following to be eligible for this position. These requirements are essential and will be verified during screening and onboarding.

• Current residence in Singapore (required).
• Native-level proficiency in Mandarin Chinese (reading, writing, comprehension).
• English proficiency at C1 level or higher.
• Bachelor’s degree (any field).
• At least 1 year of professional work experience.
• Strong critical thinking, fact-checking, attention to detail, and communication skills.
• Comfortable following complex written guidelines and asking clarifying questions.
• Comfortable reviewing potentially sensitive or 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.

Compensation & schedule

This is paid hourly, project-based freelance work. Expect a variable workload depending on project task availability; some projects may offer steady hours while others are more intermittent.

• Pay: USD 12.00 per hour (PAY_PER_HOUR).
• Minimum expected commitment: 20+ hours per week, actual hours vary by project.
• Work is contractor/part-time and paid per hour for accepted tasks.

How it works — application and onboarding

Apply through OpenTrain, complete required screenings, and join projects after calibration. Ongoing quality checks ensure labeling standards are met and continued access to tasks.

• Create a free OpenTrain account and submit your application (takes only a few minutes).
• Complete given language and skills screening for this project and any calibration tasks.
• Start accepting tasks once approved; follow project guidelines and quality checks to maintain access.
• Labeling software: project uses an assigned tool listed as OTHER; training and instructions are provided for each project.