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Nicholas Kiplagat

AI Data Annotator

Kenya flagRavine, Kenya
$6.70/hrExpertAppenAnno MageAws Sagemaker

Key Skills

Software

AppenAppen
Anno-MageAnno-Mage
AWS SageMakerAWS SageMaker
Axiom AI

Top Subject Matter

Web developer
AI annotator
Cyber security

Top Data Types

ImageImage
VideoVideo
AudioAudio

Top Task Types

PolygonPolygon
Bounding BoxBounding Box
SegmentationSegmentation
TranscriptionTranscription

Freelancer Overview

I have developed strong experience in data labeling and AI training workflows, focusing on producing high-quality, consistent annotations across diverse datasets. My work has involved labeling text, images, and structured data for machine learning models, with particular attention to accuracy, edge-case handling, and adherence to detailed annotation guidelines. I am comfortable using a variety of labeling tools and platforms, and I consistently apply quality control practices such as cross-checking, validation, and maintaining clear documentation. This ensures that the datasets I contribute to are reliable and model-ready, reducing downstream errors and improving overall model performance. What sets me apart is my ability to combine analytical thinking with efficiency and attention to detail. I have contributed to projects involving natural language processing tasks such as sentiment analysis, entity recognition, and content categorization, as well as image annotation tasks like object detection and classification. I adapt quickly to new guidelines and domains, communicate effectively with team members, and maintain high productivity without compromising quality. My commitment to continuous improvement and understanding of how labeled data impacts model outcomes allows me to consistently deliver value in AI training data projects.

ExpertEnglishSwahili

Labeling Experience

i have worked with Imerit annotation company

ImageSegmentation
In my data labeling work, the scope of projects has typically involved preparing high-quality training datasets for machine learning models across both natural language processing (NLP) and computer vision domains. For NLP projects, I performed tasks such as sentiment annotation, named entity recognition (NER), intent classification, and content moderation labeling. On the computer vision side, I handled image classification, object detection (bounding boxes), and basic segmentation tasks. Each project required strict adherence to detailed annotation guidelines, including handling ambiguous cases, flagging uncertain data, and maintaining consistency across large datasets. The project sizes I worked on ranged from a few thousand samples in specialized pilot tasks to over 100,000+ data points in large-scale production workflows. To ensure quality, I followed multiple quality control measures such as double-blind labeling (where applicable), peer reviews, and periodic audits against gold-standard datasets. I also maintained high inter-annotator agreement scores by carefully aligning with guidelines and participating in calibration exercises. Additional quality measures included self-review before submission, tracking error patterns, and incorporating feedback from QA teams to continuously improve accuracy and consistency.

In my data labeling work, the scope of projects has typically involved preparing high-quality training datasets for machine learning models across both natural language processing (NLP) and computer vision domains. For NLP projects, I performed tasks such as sentiment annotation, named entity recognition (NER), intent classification, and content moderation labeling. On the computer vision side, I handled image classification, object detection (bounding boxes), and basic segmentation tasks. Each project required strict adherence to detailed annotation guidelines, including handling ambiguous cases, flagging uncertain data, and maintaining consistency across large datasets. The project sizes I worked on ranged from a few thousand samples in specialized pilot tasks to over 100,000+ data points in large-scale production workflows. To ensure quality, I followed multiple quality control measures such as double-blind labeling (where applicable), peer reviews, and periodic audits against gold-standard datasets. I also maintained high inter-annotator agreement scores by carefully aligning with guidelines and participating in calibration exercises. Additional quality measures included self-review before submission, tracking error patterns, and incorporating feedback from QA teams to continuously improve accuracy and consistency.

2026 - Present

Education

K

Kabarak University

bachelors Degree, Computer science

bachelors Degree
2019 - 2023
K

Kabimoi Secondary School

Kenya Certificate of Secondary Education, General Secondary Education

Kenya Certificate of Secondary Education
2006 - 2009

Work History

C

Cloud Factory Company

Quality annalyst

Nairobi
2022 - Present
S

Savani Bookshop

Sales and Marketing Specialist

Ravine
2017 - Present