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Chukwuebuka Okpala

Chukwuebuka Okpala

Freelance Linguistic QA Specialist

Nigeria flagLagos, Nigeria
$30.00/hrIntermediateOther

Key Skills

Software

Other

Top Subject Matter

Speech Data Quality Assurance
Text Data Annotation for AI
Legal Services & Contract Review

Top Data Types

AudioAudio
TextText
DocumentDocument

Top Task Types

ClassificationClassification
Object DetectionObject Detection

Freelancer Overview

Freelance Linguistic QA Specialist. Brings 3+ years of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Other. Education includes Bachelor of Science, University of Nigeria (2023) and Certificate, AQskill (2026). AI-training focus includes data types such as Audio and Text and labeling workflows.

IntermediateEnglish

Labeling Experience

Freelance Linguistic QA Specialist

OtherAudio
Reviewed and refined utterances in speech datasets to ensure linguistic accuracy and fluency. Applied client-specific guidelines to normalize categories such as dates, times, addresses, and currency. Provided justifications for QA corrections and rework as part of the refinement process. • Conducted quality assurance on audio data. • Ensured compliance with international client standards. • Delivered feedback and rework instructions. • Worked remotely as a freelance specialist.

Reviewed and refined utterances in speech datasets to ensure linguistic accuracy and fluency. Applied client-specific guidelines to normalize categories such as dates, times, addresses, and currency. Provided justifications for QA corrections and rework as part of the refinement process. • Conducted quality assurance on audio data. • Ensured compliance with international client standards. • Delivered feedback and rework instructions. • Worked remotely as a freelance specialist.

2023 - Present

Data Annotation Contractor

OtherTextEntity Ner Classification
Annotated and normalized textual data for use in AI training datasets. Identified and corrected misassignments within linguistic data categories. Collaborated remotely with international teams to meet project standards and deadlines. • Performed text normalization and entity classification tasks. • Ensured consistency and accuracy across categories. • Used annotation tools to process linguistic data. • Delivered high-quality labeled datasets for AI development.

Annotated and normalized textual data for use in AI training datasets. Identified and corrected misassignments within linguistic data categories. Collaborated remotely with international teams to meet project standards and deadlines. • Performed text normalization and entity classification tasks. • Ensured consistency and accuracy across categories. • Used annotation tools to process linguistic data. • Delivered high-quality labeled datasets for AI development.

2022 - 2023

Education

A

AQskill

Certificate, Customer Relationship Management

Certificate
2026 - 2026
U

University of Nigeria

Bachelor of Science, Computer Science

Bachelor of Science
2023 - 2023

Work History

W

Wave Mobile Money

Customer Support Representative

Lagos
2023 - 2024
H

Help Scout

Customer Support Specialist

Lagos
2020 - 2021