Image Caption Reviewer - Expert

Mercor; Greater London; On-site; GBP 22,000 - 34,000; Full time

Job summary

Obsidian is seeking a detail-oriented reviewer to assess AI-generated image captions in English. You will read each caption against the corresponding image, flagging any mismatches or misread text and logging defects with supporting notes.

This role emphasizes native-level English, meticulous attention to visual details, and patience to review captions line by line. No specialist degree is required, and the position is based in Greater London.

Qualifications

• Native-level English and strong attention to visual and textual detail.
• Patience to check captions line by line against images.

Responsibilities

• Review AI-generated captions for images in English.
• Compare captions to the actual image to identify defects (wrong objects, counts, colours).
• Log every substantiated defect and note if captions do not match or misread text within images.
• Follow a fixed set of images and document findings accurately.

Skills

Native-level English

Attention to detail

Patience

Job description

Review AI-generated image captions in English and flag where they do not match the image.

You will work through a fixed set of images, reading each caption in full against the image and logging every defect you can substantiate — wrong objects or counts, wrong colours, misread text rendered inside the image, claims the image does not support. The image is the ground truth, and careful reading matters more than speed.

Requirements: native-level English, strong attention to visual and textual detail, and the patience to check a caption line by line against what is actually in front of you. No specialist degree required.