Document Annotation QA Expert

You will review Korean PDF documents after OCR processing and make sure their annotations meet detailed quality standards. The work focuses on text accuracy, document structure, and correctly labeled visual elements.

You will work through a daily quality assurance queue, correct issues, and give annotators clear feedback when documents need changes.

• Review Korean PDF documents and their annotations.
• Check bounding boxes around document fields and other elements.
• Verify Korean text, reading order, spacing, grammar, usage, and OCR transcription.
• Correct character-level OCR errors in Korean.
• Classify tables, charts, text blocks, key-value pairs, headers, footers, and other structured elements.
• Check table boundaries, row and column alignment, merged cells, headers, and document hierarchy.
• Return issues to annotators with clear, actionable notes.
• Escalate recurring error patterns and unclear guidelines to project leads.
• Confirm documents meet the required quality standard before submission.

What it pays and takes

This is a part-time contract role open to candidates in South Korea.

• Pay: Up to $40 per hour.
• Time: 20+ hours per week.
• Location: Open to candidates in South Korea.
• Language: Fluent Korean and strong professional English for project communication and written feedback.
• Experience: QA, data annotation, document review, content review, OCR validation, or a closely related role.
• Skills: Familiarity with OCR systems, document parsing, PDF annotation, or structured document review.
• Skills: Ability to verify, revise, add, and classify bounding boxes.
• Skills: Ability to review dense layouts, table structures, merged cells, headers, footers, and multi-column text.
• Approach: Strong attention to detail, consistency, and disciplined self-review.
• Helpful background: Experience with OCR-processed documents and document understanding workflows, including Korean-language layout, transcription, and annotation review at scale.

How it works

Apply on OpenTrain with your resume, then complete the application on the hiring site.

About AI training work

AI training is the human work behind systems that read, understand, and generate information. Contributors prepare and review examples such as documents, text, images, and audio so AI models can learn from accurate, consistent data; specialized skills and careful review are valuable because they improve the quality of those examples.