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J
John Chibuike

John Chibuike

Data Annotator (Multi-Modal)

Nigeria flagN/A, Nigeria
$12.00/hrEntry LevelLabel StudioToloka

Key Skills

Software

Label StudioLabel Studio
TolokaToloka

Top Subject Matter

Multi-Modal Datasets (Video, Image, Text, Audio, Geospatial)
Speech and Language Data (English and Igbo)
AI Content Evaluation and Model Alignment

Top Data Types

ImageImage
AudioAudio
TextText
DocumentDocument
VideoVideo

Top Task Types

Bounding BoxBounding Box
Audio RecordingAudio Recording
Object DetectionObject Detection
TrackingTracking
SegmentationSegmentation
ClassificationClassification
Entity (NER) ClassificationEntity (NER) Classification
TranscriptionTranscription
MappingMapping

Freelancer Overview

Data Annotator (Multi-Modal). Bring a year of professional experience across legal operations, contract review, compliance, and structured analysis. Core strengths include Internal, Proprietary Tooling, and N. Education includes Certificate of Completion, DataLens Africa (2026) and Senior Secondary Certificate of Education, N/A. AI-training focus includes data types such as Image, Video, and Text and labeling workflows including Bounding Box, Object Detection, and Tracking.

Entry LevelEnglishIgbo

Labeling Experience

Data Contributor — AI Voice Training (Silencio Project)

AudioAudio RecordingTranscription
As a voice data contributor for AI voice model training, I recorded pre-structured English and Igbo speech samples. My work demanded high accuracy, consistency, and strict adherence to task instructions to ensure quality recordings. All submissions were rated for quality, resulting in an achieved 99% quality rating. • Collected and transcribed high-quality audio data following detailed guidelines • Ensured clean signal quality and correct file formats for each submission • Managed multiple recording batches with high throughput and reliability • Demonstrated compliance with project criteria and maintained clear communication with remote supervisors.

As a voice data contributor for AI voice model training, I recorded pre-structured English and Igbo speech samples. My work demanded high accuracy, consistency, and strict adherence to task instructions to ensure quality recordings. All submissions were rated for quality, resulting in an achieved 99% quality rating. • Collected and transcribed high-quality audio data following detailed guidelines • Ensured clean signal quality and correct file formats for each submission • Managed multiple recording batches with high throughput and reliability • Demonstrated compliance with project criteria and maintained clear communication with remote supervisors.

2025 - Present

Data Annotator (Multi-Modal)

ImageBounding BoxObject Detection
In this multifaceted data annotation role, I performed labeling across video, image, text, audio, and geospatial datasets according to detailed project guidelines. Each task was completed with a consistent focus on accuracy, boundary precision, and temporal consistency. Adherence to quality standards and flexible adaptation to new annotation interfaces was required throughout. • Applied bounding boxes and performed object tracking on video/image sequences using frame-by-frame techniques • Executed segmentation tasks with polygon/brush tools and handled geospatial annotation on satellite images • Conducted text classification and Named Entity Recognition, and transcribed audio to text for structured datasets • Followed strict quality control and guideline procedures to ensure annotation validity and reliability.

In this multifaceted data annotation role, I performed labeling across video, image, text, audio, and geospatial datasets according to detailed project guidelines. Each task was completed with a consistent focus on accuracy, boundary precision, and temporal consistency. Adherence to quality standards and flexible adaptation to new annotation interfaces was required throughout. • Applied bounding boxes and performed object tracking on video/image sequences using frame-by-frame techniques • Executed segmentation tasks with polygon/brush tools and handled geospatial annotation on satellite images • Conducted text classification and Named Entity Recognition, and transcribed audio to text for structured datasets • Followed strict quality control and guideline procedures to ensure annotation validity and reliability.

2025 - Present

Independent AI Content & Research Contributor

TextClassification
As an independent contributor, I evaluated AI-generated text, providing feedback and improvement suggestions. Each content review involved assessing clarity, factual accuracy, and logical progression. Research was conducted to verify output quality and relevance for production AI systems. • Compared multiple AI responses for contextual reasonableness and correctness • Rated and classified content to support AI refinement and tuning • Flagged unclear or inaccurate AI outputs for correction by the development team • Applied up-to-date guidelines for AI model feedback and evaluation.

As an independent contributor, I evaluated AI-generated text, providing feedback and improvement suggestions. Each content review involved assessing clarity, factual accuracy, and logical progression. Research was conducted to verify output quality and relevance for production AI systems. • Compared multiple AI responses for contextual reasonableness and correctness • Rated and classified content to support AI refinement and tuning • Flagged unclear or inaccurate AI outputs for correction by the development team • Applied up-to-date guidelines for AI model feedback and evaluation.

2023 - Present

Education

D

DataLens Africa

Certificate of Completion, Data Labeling and Annotation for Artificial Intelligence Development

Certificate of Completion
2026 - 2026
N

N/A

Senior Secondary Certificate of Education, Senior Secondary Education

Senior Secondary Certificate of Education
Not specified

Work History

F

Freelance

Digital Content Evaluator & Internet Researcher

N/A
2025 - Present
I

Independent Contractor

Creative AI Developer & Content Creator

N/A
2022 - Present