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O
Okpara Chinonso

Okpara Chinonso

Data Annotation Specialist

Nigeria flagLagos, Nigeria
$15.00/hrEntry LevelOtherMindriftCVAT

Key Skills

Software

Other
MindriftMindrift
CVATCVAT

Top Subject Matter

AI-generated content / Natural Language Processing (NLP)
Legal Services & Contract Review
Regulatory Compliance & Risk Analysis

Top Data Types

ImageImage
Computer Code ProgrammingComputer Code Programming
TextText
DocumentDocument

Top Task Types

ClassificationClassification
Data CollectionData Collection
Object DetectionObject Detection
Evaluation/RatingEvaluation/Rating

Freelancer Overview

Data Annotation Specialist. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Other. AI-training focus includes data types such as Text and labeling workflows including Evaluation and Rating.

Entry LevelEnglishIgbo

Labeling Experience

Data Annotation Specialist

OtherTextClassification
As a Data Annotation Specialist at RWS International, I evaluated and annotated AI-generated text outputs according to structured quality guidelines. I applied decision frameworks to classify outputs, identified ambiguous cases, and provided feedback to improve AI response quality. The work focused on carefully assessing AI model outputs for accuracy, relevance, and alignment with prompt instructions. • Consistently maintained high annotation accuracy while meeting productivity targets. • Utilized web-based annotation platforms to label datasets for training AI models. • Reviewed edge cases to ensure consistent application of rubric and guidelines. • Contributed to the overall improvement of AI output quality with detailed analyses.

As a Data Annotation Specialist at RWS International, I evaluated and annotated AI-generated text outputs according to structured quality guidelines. I applied decision frameworks to classify outputs, identified ambiguous cases, and provided feedback to improve AI response quality. The work focused on carefully assessing AI model outputs for accuracy, relevance, and alignment with prompt instructions. • Consistently maintained high annotation accuracy while meeting productivity targets. • Utilized web-based annotation platforms to label datasets for training AI models. • Reviewed edge cases to ensure consistent application of rubric and guidelines. • Contributed to the overall improvement of AI output quality with detailed analyses.

2025 - 2025

Education

I

Imo State Polytechnic, Umuagwo

Higher National Diploma, Computer Science

Higher National Diploma
2019 - 2019
I

Imo State Polytechnic, Umuagwo

National Diploma, Computer Science

National Diploma
2016 - 2016

Work History

1

10Alytics

Data Engineer

Lagos
2025 - Present
H

Huawei Technologies

Data Engineer

Lagos
2023 - 2025