Pauline Waithira

Key Skills

Software

Appen

CVAT

Data Annotation Tech

Labelbox

Roboflow

Toloka

Top Subject Matter

No subject matter listed

Top Data Types

Image

Top Label Types

Bounding Box

Freelancer Overview

I am an experienced AI training specialist and data annotation analyst with a strong background in supporting large-scale language model development and evaluation. My hands-on work spans text, audio, and video datasets, where I have applied detailed labeling taxonomies, performed content classification, and ensured high-quality structured annotation. I am skilled in evaluating AI outputs for factual accuracy, detecting hallucinations, and analyzing reasoning and instruction compliance. My experience includes maintaining high inter-annotator agreement, validating datasets, and providing structured feedback to improve model performance and alignment. I am proficient with tools such as Microsoft Excel, Google Sheets, and cloud-based file management systems, and I excel in remote, collaborative environments. My attention to detail and commitment to quality assurance have contributed to the successful refinement of AI models across diverse projects.

Labeling Experience

Computer Vision Data Annotator – Object Detection

AppenImageBounding Box

Performed image annotation by drawing precise bounding boxes around vehicles, pedestrians, traffic signs, and road infrastructure elements. Ensured tight box alignment and correct class labeling according to project taxonomy. Reviewed edge cases such as partial occlusion and low-visibility conditions. Worked on high-volume datasets and followed strict quality control processes to meet accuracy thresholds required for model deployment.

Performed image annotation by drawing precise bounding boxes around vehicles, pedestrians, traffic signs, and road infrastructure elements. Ensured tight box alignment and correct class labeling according to project taxonomy. Reviewed edge cases such as partial occlusion and low-visibility conditions. Worked on high-volume datasets and followed strict quality control processes to meet accuracy thresholds required for model deployment.

2025 - 2025

Education

Work History