QC Reviewer - Human Pose Keypoint Annotations Job at Welo Global, Remote

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  • Welo Global
  • Remote

Job Description

About the Role

We are looking for a detail-oriented QC Reviewer to ensure the accuracy and consistency of human pose keypoint annotations on thermal images. You will review annotator submissions within Label Studio , verify correct keypoint placement (including inferred positions for occluded body parts), and provide clear feedback to drive rework where needed.

Key Responsibilities

  • Review completed keypoint annotations against the source thermal images, verifying person count and per-person annotation completeness.
  • Check that each keypoint is placed as close as possible to the true anatomical center of the corresponding body part.
  • Evaluate whether inferred keypoints (for occluded/obstructed body parts) are anatomically plausible and consistent with visible body positioning.
  • Verify that confidence flags were applied appropriately for uncertain or difficult cases, and flag missing or misused confidence indicators.
  • Identify systematic errors or patterns of confusion (e.g., consistent mislabeling in certain poses or occlusion types) and report them for annotator calibration.
  • Provide specific, actionable feedback on rejected or revised annotations within Label Studio 's review workflow.
  • Participate in periodic calibration sessions to align QC standards with the client's evolving guidelines or edge-case resolutions.
  • Track and document review outcomes, common error types, and annotator performance trends as required.

Requirements

Required:

  • Prior experience in computer vision annotation QA , review, or a related quality-control role.
  • Strong understanding of human anatomy and pose structure to accurately assess keypoint placement, including inferred/occluded cases.
  • Exceptional attention to detail — able to catch subtle placement errors, incorrect inferences, or misapplied confidence flags.
  • Comfort working with thermal/infrared imagery and its visual limitations.
  • Ability to apply detailed annotation/QC guidelines consistently and exercise sound judgment on ambiguous or edge-case scenarios.
  • Strong written communication skills for providing clear, constructive feedback to annotators.
  • Familiarity with Label Studio , including review/approval workflows, or willingness to quickly learn the platform.
  • Reliable, self-directed work habits with the ability to meet review turnaround expectations.

Nice to Have:

  • Direct experience with human pose estimation datasets (e.g., COCO keypoints ) or keypoint QA specifically.
  • Experience with thermal/infrared imagery QA.
  • Background in computer vision , robotics, or security/surveillance imaging.
  • Experience managing structured QA/rework feedback loops for annotation teams.

Job Tags

Freelance

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