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Ephraim Ezaka

Ephraim Ezaka

Data Labeling Specialist | AI Training & Quality Evaluation

Nigeria flagZaria, Kaduna State, Nigeria
$15.00/hrExpertAxiom AIClickworkerCloudfactory

Key Skills

Software

Axiom AI
ClickworkerClickworker
CloudFactoryCloudFactory
CrowdSourceCrowdSource
Data Annotation TechData Annotation Tech
LabelImgLabelImg

Top Subject Matter

Data Annotation / Data Labeling
Audio & Speech Processing
Conversational AI / NLP

Top Data Types

DocumentDocument
TextText
AudioAudio

Top Task Types

Question AnsweringQuestion Answering
Text GenerationText Generation
Evaluation/RatingEvaluation/Rating
TranscriptionTranscription
Object DetectionObject Detection

Freelancer Overview

I have hands-on experience in data labeling and AI training tasks, particularly in evaluating multimodal datasets involving text, audio, and image inputs. My work includes annotating and validating data for accuracy, consistency, and relevance, as well as identifying edge cases and providing detailed feedback to improve model performance. I am proficient in following complex annotation guidelines, handling tasks such as audio transcription review, response ranking, and quality assessment across different AI outputs. What sets me apart is my strong quality assurance background, which translates directly into maintaining high annotation accuracy and consistency. I am highly detail-oriented, skilled at following complex guidelines, and experienced in identifying edge cases and ambiguous data points. My experience with structured evaluation, documentation, and SOPs enables me to deliver reliable, well-documented annotations while maintaining efficiency under tight deadlines. I am also adaptable and quick to learn new tools, making it easy for me to integrate into different AI training workflows.

ExpertEnglishIgbo

Labeling Experience

Multimodal AI Data Annotation & Quality Evaluation

AudioQuestion Answering
Worked on multimodal AI training tasks involving text and audio data annotation, evaluation, and validation. Responsibilities included reviewing sequential audio recordings (system, user, and model responses), ensuring full comprehension before proceeding with annotation tasks, and assessing response quality based on accuracy, relevance, coherence, and instruction adherence. Performed response ranking between multiple model outputs, identified errors and inconsistencies, and flagged edge cases to improve model performance. Maintained strict adherence to detailed annotation guidelines while ensuring consistency across tasks. Contributed to improving training data quality by providing structured feedback and accurate labeling across multiple datasets under tight deadlines.

Worked on multimodal AI training tasks involving text and audio data annotation, evaluation, and validation. Responsibilities included reviewing sequential audio recordings (system, user, and model responses), ensuring full comprehension before proceeding with annotation tasks, and assessing response quality based on accuracy, relevance, coherence, and instruction adherence. Performed response ranking between multiple model outputs, identified errors and inconsistencies, and flagged edge cases to improve model performance. Maintained strict adherence to detailed annotation guidelines while ensuring consistency across tasks. Contributed to improving training data quality by providing structured feedback and accurate labeling across multiple datasets under tight deadlines.

2025 - 2026

Education

N

Nnamdi Azikiwe University

Bachelor of Science, Parasitology and Entomology

Bachelor of Science
2014 - 2018

Work History

H

Hopper

Virtual Assistant

N/A
2023 - 2025
B

Brad Baldwin Fitness

Customer Service Specialist

Miami
2021 - 2023