Joseph Murage M.

Key Skills

Software

Sama

CVAT

Data Annotation Tech

Google Cloud Vertex AI

iMerit

OneForma

Remotasks

Appen

Clickworker

Top Subject Matter

Global AI client image annotation (sensitive content)

NLP and computer vision datasets (healthcare, autonomous vehicles, African languages)

Top Data Types

Image

Text

Video

Top Task Types

Classification

Text Generation

Object Detection

Question Answering

Data Collection

Freelancer Overview

Data Annotator at Sama Kenya (Nairobi). Brings 6+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Sama, N, and A. Education includes Bachelor of Science, University of Nairobi (2020). AI-training focus includes data types such as Image and Text and labeling workflows including Classification and Entity (NER).

Labeling Experience

Data Annotator at Sama Kenya (Nairobi)

SamaImageClassification

Annotated high-volume image data for global AI clients, achieving 99%+ accuracy. Applied strict ethical and quality guidelines for sensitive content to support safer AI systems. Collaborated with project leads to refine annotation protocols and improve consistency. • Labeled over 100,000 image, speech, and video data points • Ensured 99%+ accuracy through quality checks • Participated in training programs to improve labeling speed and precision • Contributed to ethical, culturally relevant data practices

2021 - Present

Junior Data Annotator at Ng'ara Data (Nairobi)

Text

Annotated diverse datasets for NLP and computer vision projects to support AI development in healthcare and autonomous vehicles. Used multi-layer quality checks to ensure dataset consistency and reliability. Provided feedback on edge cases to improve model training accuracy for African language data. • Supported NLP and computer vision annotation workflows • Applied multi-layer QC validation • Flagged and discussed edge cases • Improved training data quality for African language use cases

2020 - 2021

Education

Work History