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Kelvin Chinanu Okoroafor

Kelvin Chinanu Okoroafor

Data Annotator/ AI Trainer

Nigeria flagPort Harcourt, Nigeria
$15.00/hrExpertOneformaHumanaticLabelimg

Key Skills

Software

OneFormaOneForma
HumanaticHumanatic
LabelImgLabelImg
Micro1
ClickworkerClickworker
TolokaToloka
Data Annotation TechData Annotation Tech
HiveMindHiveMind

Top Subject Matter

NLP AI Model Training
data annotations

Top Data Types

TextText
DocumentDocument
ImageImage

Top Task Types

ClassificationClassification
Bounding BoxBounding Box
Object DetectionObject Detection
Text SummarizationText Summarization
RLHFRLHF
Fine-tuningFine-tuning
Question AnsweringQuestion Answering
SegmentationSegmentation
TranscriptionTranscription
Data CollectionData Collection
Text GenerationText Generation

Freelancer Overview

Data Annotator/ AI Trainer. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include OneForma. Education includes Bachelor of Science, University of Port Harcourt (2023). AI-training focus includes data types such as Text and labeling workflows including Classification.

ExpertEnglishIgbo

Labeling Experience

OneForma

Data Annotator/ AI Trainer

OneformaTextClassification
As a Data Annotator and AI Trainer at Oneforma, I was responsible for labeling, classifying, and evaluating text datasets to train advanced NLP and LLM models. I conducted sentiment analysis, intent classification, entity tagging, and text categorization on diverse corpora following strict annotation guidelines. I performed comprehensive quality checks and provided feedback to optimize inter-annotator agreement and output precision. • Utilized JSON and CSV formatted data, ensuring data integrity and correct structure. • Worked with team leads to identify and correct annotation discrepancies. • Consistently met or surpassed daily productivity and quality targets for labeled data. • Contributed to improvements in annotation workflows and best practices.

As a Data Annotator and AI Trainer at Oneforma, I was responsible for labeling, classifying, and evaluating text datasets to train advanced NLP and LLM models. I conducted sentiment analysis, intent classification, entity tagging, and text categorization on diverse corpora following strict annotation guidelines. I performed comprehensive quality checks and provided feedback to optimize inter-annotator agreement and output precision. • Utilized JSON and CSV formatted data, ensuring data integrity and correct structure. • Worked with team leads to identify and correct annotation discrepancies. • Consistently met or surpassed daily productivity and quality targets for labeled data. • Contributed to improvements in annotation workflows and best practices.

2020 - 2025

Education

U

University of Port Harcourt

Bachelor of Science, Accounting

Bachelor of Science
2023 - 2023

Work History

S

Self-Employed

Freelance Virtual Assistant

Port Harcourt
2018 - 2019