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Charles John

Charles John

Freelance Data Labeling & AI Training Specialist

Kenya flagNairobi, Kenya
$10.00/hrExpertOtherMercorAppen

Key Skills

Software

Other
MercorMercor
AppenAppen
MindriftMindrift

Top Subject Matter

General AI/ML datasets

Top Data Types

TextText
ImageImage
VideoVideo

Top Task Types

Entity (NER) ClassificationEntity (NER) Classification
SegmentationSegmentation
Text SummarizationText Summarization
TranscriptionTranscription
Bounding BoxBounding Box

Freelancer Overview

Freelance Data Labeling & AI Training Specialist. Brings 13+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. Education includes Degree, Jomo Kenyatta University of Agriculture and Technology (2010). AI-training focus includes data types such as Text and labeling workflows including Entity (NER) Classification.

ExpertEnglishSwahili

Labeling Experience

Freelance Data Labeling & AI Training Specialist

OtherVideoEntity Ner Classification
As a freelance Data Labeling & AI Training Specialist, I have been responsible for annotating and labeling text, audio, and image datasets for AI and machine learning models. My work involves applying precise labeling, entity recognition, transcription, and classification techniques based on diverse project requirements. I ensure high accuracy, consistent application of guidelines, and thorough quality validation through multi-pass reviews. • Expert in handling large-scale datasets and adhering to complex annotation standards. • Proficient in delivering structured outputs in formats such as JSON and TXT. • Experienced in text, audio, and image annotation, including entity tagging, classification, and quality assurance. • Maintains strict data confidentiality and contributes to improving model performance.

As a freelance Data Labeling & AI Training Specialist, I have been responsible for annotating and labeling text, audio, and image datasets for AI and machine learning models. My work involves applying precise labeling, entity recognition, transcription, and classification techniques based on diverse project requirements. I ensure high accuracy, consistent application of guidelines, and thorough quality validation through multi-pass reviews. • Expert in handling large-scale datasets and adhering to complex annotation standards. • Proficient in delivering structured outputs in formats such as JSON and TXT. • Experienced in text, audio, and image annotation, including entity tagging, classification, and quality assurance. • Maintains strict data confidentiality and contributes to improving model performance.

2014 - Present

Education

J

Jomo Kenyatta University of Agriculture and Technology

Degree

Degree
2010 - 2010

Work History

D

Data Labeling & AI Training Specialist (

Freelancer

Nairobi
2014 - Present
D

Data Annotation & Transcription Specialist (

Freelancer

Nairobi
2014 - Present