Churchill W.

Key Skills

Software

Sama

Top Subject Matter

AI/ML Training Data

Top Data Types

Text

Image

Audio

Video

Top Task Types

Classification

Segmentation

Object Detection

Transcription

Freelancer Overview

AI Expert – Data Annotation. Brings 6+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Sama. Education includes Bachelor of Science, University of Nairobi (2016) and Kenya Certificate of Secondary Education, St Mary’s School, Yala (2010). AI-training focus includes data types such as Text, Image, and Audio and labeling workflows including Classification, Segmentation, and Object Detection.

Labeling Experience

AI Expert – Data Annotation

SamaTextClassificationSegmentation

I performed high-quality data annotation and labeling across multiple data types for machine learning and AI model training pipelines. I reviewed, validated, and maintained productivity and quality benchmarks in large-scale annotation projects while adhering to client guidelines. Collaborated with quality assurance teams to resolve discrepancies, improve annotation guidelines, and contributed to datasets for global technology clients. • Annotated text, images, audio, and video for NLP and computer vision models. • Participated in calibration sessions and feedback loops to enhance annotation quality. • Provided subject matter expertise in data labeling tasks and guideline refinement. • Documented workflows and developed internal best practice guidelines.

2019 - Present

Education

Work History