Hand Anatomy Keypoint Annotator

About OpenTrain

OpenTrain is the #1 platform for finding and building careers in AI training and data labeling. OpenTrain AI is hiring and contracting contributors for projects that help shape how modern artificial intelligence systems understand the world.

• Create a free OpenTrain account and apply in minutes
• Build experience in a fast-growing AI training industry
• Work remotely as part of a flexible contractor opportunity

About AI Training Work

AI training is the human side of building artificial intelligence. Contributors prepare and review examples—including annotated images and video—that help AI models learn to recognize objects, movements, and complex visual patterns.

• Work directly on projects supporting next-generation AI systems
• Use your subject-matter expertise to improve model quality
• Enjoy remote, flexible work that can fit around other commitments

The Role

OpenTrain AI is seeking a Hand Anatomy Keypoint Annotator to identify and annotate hand and finger landmarks on images and video frames. Your specialized knowledge in anatomy, medicine, or physiotherapy will help AI systems understand complex human hand poses and interactions.

This is a fully remote contractor position for part-time work of 20 or more hours per week. Prior AI experience is not required; the role relies on your domain knowledge, visual reasoning, and ability to follow precise annotation protocols.

• Employment type: Contractor and part-time
• Work arrangement: Fully remote
• Time commitment: 20+ hours per week
• Language: English
• Experience level: Entry level

What You'll Do

You will produce accurate point and keypoint annotations for hands across varied images and video frames. The work requires careful interpretation of anatomy, pose, orientation, perspective, and partial visibility.

• Annotate hand and finger landmarks using MediaPipe-style hand topology
• Mark the wrist, MCP, PIP, DIP, and fingertip landmarks
• Mark thumb-specific joints, including CMC, MCP, IP, and the thumb tip
• Follow defined annotation protocols and tolerance thresholds
• Infer and annotate partially occluded or visually challenging joints
• Interpret a wide range of hand poses, orientations, and perspectives
• Review visual feedback, identify deviations, and make corrections
• Maintain annotation quality with a quality-assurance mindset

Requirements

This role is designed for applicants with formal or equivalent knowledge of anatomy and the structure of the hand. You should be comfortable analyzing visual material and applying detailed guidelines consistently.

• Anatomy, medicine, or physiotherapy degree or equivalent coursework
• Understanding of hand skeletal anatomy and joint terminology
• Familiarity with MCP, PIP, DIP, and CMC joints
• Ability to interpret complex hand poses and partial occlusions
• Strong attention to detail and visual reasoning
• Ability to follow strict annotation protocols and tolerance thresholds
• Comfort with image and video analysis
• Willingness to maintain consistent annotation quality

Compensation And Schedule

The listed pay range is $15–$80 per hour. The rate is based on experience and availability and will be discussed during the application process.

• Pay type: Hourly
• Hourly range: $15–$80 USD
• Availability: 20+ hours per week
• Position type: Remote contractor

How To Apply

Create a free OpenTrain account to apply for this opportunity and begin building your AI training profile. This project is a chance to turn anatomy or physiotherapy expertise into practical experience helping train advanced visual AI systems.

• Review the role requirements
• Create or update your OpenTrain profile
• Apply in minutes
• Discuss your experience and availability during the application process