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Mercy Ogunleye

Mercy Ogunleye

Data Annotation and Sentiment Classification Analyst

Nigeria flagLagos, Nigeria
$10.00/hrIntermediateArgillaOther

Key Skills

Software

ArgillaArgilla
Other

Top Subject Matter

Business and Political News
Technology and AI Training
Healthcare and Medical

Top Data Types

TextText
DocumentDocument
AudioAudio

Top Task Types

ClassificationClassification
Question AnsweringQuestion Answering
RLHFRLHF
Text SummarizationText Summarization
TranscriptionTranscription
Data CollectionData Collection
Evaluation/RatingEvaluation/Rating

Freelancer Overview

Content Evaluator & Text Data Annotator (AI Training). Brings 1+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. Education includes Bachelor of Science, Federal University Kashere (2023). AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

IntermediateEnglishHausa

Labeling Experience

Content Evaluator & Text Data Annotator (AI Training)

OtherTextRLHF
This role involved the classification and evaluation of text data within business and political news content. I consistently performed sentiment analysis, annotating data as positive, negative, or neutral across a large volume of articles. Additionally, I evaluated content for factual accuracy, relevance, and completeness as part of regular AI model training tasks. • Followed precise annotation guidelines to ensure quality and consistency • Conducted side-by-side evaluation and ranking of generated outputs • Reported inconsistencies, hallucinations, and quality issues • Utilized Python and spreadsheet tools for annotation and analysis

This role involved the classification and evaluation of text data within business and political news content. I consistently performed sentiment analysis, annotating data as positive, negative, or neutral across a large volume of articles. Additionally, I evaluated content for factual accuracy, relevance, and completeness as part of regular AI model training tasks. • Followed precise annotation guidelines to ensure quality and consistency • Conducted side-by-side evaluation and ranking of generated outputs • Reported inconsistencies, hallucinations, and quality issues • Utilized Python and spreadsheet tools for annotation and analysis

2025 - Present

Education

F

Federal University Kashere

Bachelor of Science, Political Science

Bachelor of Science
2019 - 2023

Work History

P

Publica AI Limited

Data Analyst & QA Tester

Lagos
2025 - Present