About this role
OpenTrain AI
Annotate tissue types and functional structures in whole-slide histopathology images from laboratory animals. This expert contract offers a fixed $40 payment and flexible work under 20 hours per week.
Image & Video Annotation
100% Remote Fixed price · $40
$40 fixed price
Compensation
Contract, part-time
Engagement
Remote
Location
Nov 12, 2026
Posted
Open worldwide
The work
You will annotate digitized H&E whole-slide histopathology images from rat, mouse, dog and non-human primate studies. Work follows detailed guidelines, with review by expert veterinary pathologists.
You will label tissue classes and functional structures, mark uncertain regions for expert review, and use reviewer feedback to improve consistency over time.
- Outline and label tissue classes such as erythrocytes, leukocytes, squamous and glandular epithelium, connective tissue, and bone.
- Annotate structures including glomeruli, thyroid follicles, alveolar regions, and blood vessels.
- Follow rules for boundaries, minimum region sizes, and overlapping classes.
- Flag uncertain areas instead of guessing.
- Take part in periodic recalibration and act on reviewer feedback.
What it pays and takes
This is a part-time contractor role for an expert in veterinary toxicologic histopathology. The work is open worldwide and requires professional fluency in English.
- Pay: Fixed price of $40.
- Time: Less than 20 hours per week.
- Work arrangement: Remote and part time.
- Experience: Expert-level experience is required.
- Relevant fields: Pathology, histopathology and cytotechnology, veterinary medicine, or veterinary pathology.
- Language: Professional fluency in English.
How it works
Apply on OpenTrain, where the employer reviews applications.
About AI training work
AI training is the human work behind systems that learn from examples. In image annotation, specialists label parts of images so AI systems can learn to recognize and interpret them.
Requirements
- Experience: Expert level
- Languages: English