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Samuel Nyambura

Samuel Nyambura

Data Annotation Specialist & AI Evaluator

Kenya flagNairobi, Kenya
$6.00/hrExpertCVAT

Key Skills

Software

CVATCVAT

Top Subject Matter

Nlp Domain Expertise
computer vision
and speech recognition

Top Data Types

ImageImage
TextText
DocumentDocument

Top Task Types

Classification

Freelancer Overview

Data Annotation Specialist & AI Evaluator. Core strengths include CVAT. Education includes Bachelor of Science, University of Nairobi (2021). AI-training focus includes data types such as Image and labeling workflows including Classification.

ExpertFrenchEnglish

Labeling Experience

CVAT

Data Annotation Specialist & AI Evaluator

CVATImageClassification
As a Data Annotation Specialist & AI Evaluator at CVAT.AI, I annotated and labeled a wide range of datasets including images, video, audio, and text following detailed project guidelines. My responsibilities included video segmentation, action labeling, image categorization, audio transcription, and text-based AI output evaluation. I consistently conducted prompt-based annotation reviews and rigorous quality assurance checks to maintain high accuracy. • Labeled, segmented, and categorized image and video datasets for AI training • Transcribed and annotated audio for speech-to-text and NLP applications • Evaluated and fact-checked LLM and text-based AI outputs for accuracy and intent • Maintained quality standards with a 95–98%+ accuracy track record

As a Data Annotation Specialist & AI Evaluator at CVAT.AI, I annotated and labeled a wide range of datasets including images, video, audio, and text following detailed project guidelines. My responsibilities included video segmentation, action labeling, image categorization, audio transcription, and text-based AI output evaluation. I consistently conducted prompt-based annotation reviews and rigorous quality assurance checks to maintain high accuracy. • Labeled, segmented, and categorized image and video datasets for AI training • Transcribed and annotated audio for speech-to-text and NLP applications • Evaluated and fact-checked LLM and text-based AI outputs for accuracy and intent • Maintained quality standards with a 95–98%+ accuracy track record

2024 - 2025

Education

U

University of Nairobi

Bachelor of Science, Information Technology

Bachelor of Science
2021 - 2021

Work History

I

iSON Xperiences

Operations Team Lead

Nairobi
2025 - Present
F

Fiverr

Digital Freelancer

Nairobi
2026 - 2026