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S
Sylvia J.

Sylvia J.

AI Data Annotator - Healthcare & Life science

Kenya flagNairobi, Kenya

Key Skills

Software

MercorMercor
SamaSama
Scale AIScale AI
RemotasksRemotasks
AppenAppen
Label StudioLabel Studio
LabelImgLabelImg

Top Subject Matter

Healthcare - medical records & life sciences

Top Data Types

TextText
ImageImage
DocumentDocument

Top Task Types

Text GenerationText Generation
Fine-tuningFine-tuning
TranscriptionTranscription
Evaluation/RatingEvaluation/Rating
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
Text SummarizationText Summarization
Question AnsweringQuestion Answering
ClassificationClassification

Freelancer Overview

I have extensive experience working in data annotation, content evaluation, and information verification through my roles in fact-checking, journalism, and AI-related projects. As Deputy Editor at Africa Check and previously a Senior Fact-checker and Verification Researcher at PesaCheck, I have reviewed, classified, verified, and assessed large volumes of text, images, videos, and online content for accuracy, credibility, and policy compliance. My work requires strong attention to detail, critical thinking, data quality assessment, source evaluation, and the ability to apply complex guidelines consistently across diverse content types. In addition, I have experience working with AI training and evaluation platforms, including Mercor, where I have contributed to tasks involving content review, annotation, and quality assessment. My background in research, public health, and misinformation analysis has strengthened my ability to identify nuanced patterns, detect inaccuracies, evaluate outputs against defined rubrics, and provide high-quality annotations. I hold a Master's-level research background in Health Information Systems and have extensive experience developing evaluation frameworks, conducting audits, and ensuring data quality, making me well-suited for AI training, data labeling, content moderation, and model evaluation projects.

Labeling Experience

Fact-checking/ Reviewer and Editorial quality specialist

TextTextClassificationClassification

O serve as a fact-checking reviewer and ediro responsible for evaluating and accuracy, credibility and quality opf text based content. Tasks included reviewing claims against authpritative sources, classifying misinformation and Disinformation, assessing evidence quality, verifying citations, identifying unsupported conclusions and ensuring compliance wioth editorial and quality standards.

2023 - Present

Generalist Expert

TextTextQuestion AnsweringQuestion Answering

Worked on AI training and evaluation projects involving text annotation, question answering, prompt evaluation, respinse verification and quality assessment. responsibilities include reviewing ai generated responses for accuracy, relevance, completeness, instruction adherence, safety compliance. Also identifying factual errors and unsupported claims to ensure consistency.

2025 - 2026

Education

A

Amref University

MPH in Health information systems, Health information systems

MPH in Health information systems
2024 - 2026
M

Moi University

Bsc in Information sciences , Information Science

Bsc in Information sciences
2009 - 2012

Work History

A

Africa Check

Deputy Editor Kenya

Nairobi
2023 - Present
A

Africa Check

Senior Researcher

Nairobi
2021 - 2023