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Dancan Mwangi

Dancan Mwangi

AI Data Annotator - Machine Learning

KENYA flag
Nairobi, Kenya
$50.00/hrExpertMercor

Key Skills

Software

MercorMercor

Top Subject Matter

No subject matter listed

Top Data Types

VideoVideo

Top Label Types

Segmentation
Text Generation

Freelancer Overview

I am a detail-oriented data professional with a background in computer science and hands-on experience in AI data annotation and labelling for both NLP and computer vision projects. My work involves preparing and validating high-quality datasets, ensuring accuracy, and following structured guidelines to support machine learning model development. I am skilled in handling text, image, and audio data, and I use tools such as Python, Excel, Google Sheets, and various data labelling platforms. I excel at maintaining data consistency, meeting project deadlines, and working independently or as part of remote teams. My strong analytical skills and high attention to detail help me deliver reliable training data for AI applications.

ExpertEnglishSwahili

Labeling Experience

Mercor

AI Data Labeling & Annotation Experience

MercorVideoSegmentationText Generation
I have worked on multiple AI data labeling and annotation projects involving text, image, and audio datasets. In text annotation projects, I performed sentiment analysis, intent classification, named entity recognition (NER), and content moderation labeling for NLP models. I followed detailed annotation guidelines to ensure consistency and high accuracy, while reviewing and correcting flagged data. For computer vision tasks, I labeled and categorized images, performed bounding box annotations, object classification, and image segmentation for training computer vision models. I ensured precise tagging and conducted quality checks to maintain dataset reliability. I have also worked on audio data annotation, including transcription and speech intent labeling to support speech recognition and conversational AI systems. Across all projects, I maintained high accuracy standards, met tight deadlines, and adhered strictly to project guidelines and data confidentiality requirements. I am co

I have worked on multiple AI data labeling and annotation projects involving text, image, and audio datasets. In text annotation projects, I performed sentiment analysis, intent classification, named entity recognition (NER), and content moderation labeling for NLP models. I followed detailed annotation guidelines to ensure consistency and high accuracy, while reviewing and correcting flagged data. For computer vision tasks, I labeled and categorized images, performed bounding box annotations, object classification, and image segmentation for training computer vision models. I ensured precise tagging and conducted quality checks to maintain dataset reliability. I have also worked on audio data annotation, including transcription and speech intent labeling to support speech recognition and conversational AI systems. Across all projects, I maintained high accuracy standards, met tight deadlines, and adhered strictly to project guidelines and data confidentiality requirements. I am co

2018 - 2025

Education

U

University of Nairobi

Bachelor of Science, Computer Science

Bachelor of Science
2016 - 2020

Work History

T

TONIC

Data Specialist

London
2022 - 2024