Lucy Wambui

Key Skills

Software

CVAT

CloudFactory

Scale AI

Top Subject Matter

Autonomous Vehicles

Road Scenes

Computer Vision

Top Data Types

Image

Top Task Types

Polygon

Bounding Box

Freelancer Overview

Data Labeling Specialist (Freelance / Remote). Brings 6+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include CVAT, CloudFactory, and Atlas. Education includes Bachelor of Science, University of Nairobi. AI-training focus includes data types such as Image and labeling workflows including Polygon, Bounding Box, and Evaluation.

Labeling Experience

Atlas Annotation Reviewer (Kenya-based contractor)

Image

As an Atlas Labeling Platform contractor, I reviewed and rated hundreds of daily annotations for accuracy and adherence to edge-case guidelines. I provided escalation of ambiguous cases using documentation and screenshots, helping ensure platform-wide labeling standards. My role focused on maintaining first-pass accuracy benchmarks for quality assurance. • Reviewed 500+ image annotations daily for compliance standards. • Documented and escalated unclear cases to project leads. • Contributed to corrective feedback loops to improve annotation guidelines. • Ensured 95%+ first-pass annotation accuracy.

As an Atlas Labeling Platform contractor, I reviewed and rated hundreds of daily annotations for accuracy and adherence to edge-case guidelines. I provided escalation of ambiguous cases using documentation and screenshots, helping ensure platform-wide labeling standards. My role focused on maintaining first-pass accuracy benchmarks for quality assurance. • Reviewed 500+ image annotations daily for compliance standards. • Documented and escalated unclear cases to project leads. • Contributed to corrective feedback loops to improve annotation guidelines. • Ensured 95%+ first-pass annotation accuracy.

2025 - Present

Data Labeling Specialist (Freelance / Remote)

CVATImagePolygon

As a freelance Data Labeling Specialist, I annotated images weekly using CVAT with polygon and bounding box tools for autonomous vehicle perception models. I consistently achieved a >98% QA acceptance rate by adhering to strict label ontologies and guidelines. I also used brush tools for semantic segmentation and contributed feedback to project guidelines. • Annotated over 1,000 images per week for road scene understanding. • Applied polygon and bounding box tools for object and shape identification. • Used brush tool for multi-class semantic segmentation. • Maintained rigorous quality assurance for all submitted annotations.

As a freelance Data Labeling Specialist, I annotated images weekly using CVAT with polygon and bounding box tools for autonomous vehicle perception models. I consistently achieved a >98% QA acceptance rate by adhering to strict label ontologies and guidelines. I also used brush tools for semantic segmentation and contributed feedback to project guidelines. • Annotated over 1,000 images per week for road scene understanding. • Applied polygon and bounding box tools for object and shape identification. • Used brush tool for multi-class semantic segmentation. • Maintained rigorous quality assurance for all submitted annotations.

2024 - Present

Data Annotator

CloudfactoryImageBounding Box

At CloudFactory Kenya, I performed large-scale image and video annotation for global computer vision clients using proprietary tools. My specialization included bounding box, polygon, brush, and keypoint annotation for object detection and pose estimation. I sustained 99% accuracy over more than 50,000 labeled frames. • Labeled medical, agricultural, and urban objects in images and video. • Used bounding boxes, polygons, and brush segmentation on diverse datasets. • Applied Atom keypoints for human and animal pose annotation. • Managed high annotation volumes while prioritizing task quality.

At CloudFactory Kenya, I performed large-scale image and video annotation for global computer vision clients using proprietary tools. My specialization included bounding box, polygon, brush, and keypoint annotation for object detection and pose estimation. I sustained 99% accuracy over more than 50,000 labeled frames. • Labeled medical, agricultural, and urban objects in images and video. • Used bounding boxes, polygons, and brush segmentation on diverse datasets. • Applied Atom keypoints for human and animal pose annotation. • Managed high annotation volumes while prioritizing task quality.

2021 - Present

Freelance Image Annotator

Scale AIImageBounding Box

As a freelance Image Annotator on Upwork/Scale AI, I labeled thousands of e-commerce product images using bounding box and keypoint tools. My focus was on annotating fashion attributes for machine learning applications. I maintained a near-perfect client rating through speed and high annotation precision. • Performed over 10,000 product attribute annotations on clothing images. • Used bounding box and keypoint techniques for detailed fashion labeling. • Focused on e-commerce data for retail AI models. • Scored 4.9/5 on client satisfaction metrics.

As a freelance Image Annotator on Upwork/Scale AI, I labeled thousands of e-commerce product images using bounding box and keypoint tools. My focus was on annotating fashion attributes for machine learning applications. I maintained a near-perfect client rating through speed and high annotation precision. • Performed over 10,000 product attribute annotations on clothing images. • Used bounding box and keypoint techniques for detailed fashion labeling. • Focused on e-commerce data for retail AI models. • Scored 4.9/5 on client satisfaction metrics.

2018 - 2019

Education

Work History