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T

Tobiloba Chelsea

AI Data Labeling & Annotation Specialist | Multi-Modal AI Training (Image, Text, Audio, Video)

Nigeria flagPort Harcourt, Nigeria
$20.00/hrExpertAppenClickworkerLabel Studio

Key Skills

Software

AppenAppen
ClickworkerClickworker
Label StudioLabel Studio
OpenCV AI Kit (OAK)OpenCV AI Kit (OAK)
OneFormaOneForma
MindriftMindrift
TelusTelus
TolokaToloka
Anno-MageAnno-Mage
CrowdFlowerCrowdFlower
CloudFactoryCloudFactory
Data Annotation TechData Annotation Tech
DataloopDataloop
DataturkDataturk
Deep SystemsDeep Systems
LabelboxLabelbox
Micro1
RemotasksRemotasks

Top Subject Matter

Artificial Intelligence (AI) – Model Training & Data Labeling
Speech Recognition – Audio Transcription & Speaker Tagging
Robotics – Environment Mapping & Object Detection

Top Data Types

VideoVideo
AudioAudio
ImageImage

Top Task Types

PolygonPolygon
SegmentationSegmentation
ClassificationClassification
Bounding BoxBounding Box
Text GenerationText Generation
Question AnsweringQuestion Answering
Text SummarizationText Summarization
Fine-tuningFine-tuning
TranscriptionTranscription
Evaluation/RatingEvaluation/Rating
Data CollectionData Collection
Prompt + Response Writing (SFT)Prompt + Response Writing (SFT)
CuboidCuboid

Freelancer Overview

I have experience in data labeling, AI training, and QA testing, with strong skills in dataset validation, data cleaning, and preprocessing. I pay close attention to detail to ensure accuracy and consistency across all tasks, including NLP tagging, image and audio annotation, and data categorization. I am also skilled in content moderation, sentiment analysis, and error detection, which helps maintain high-quality datasets. I am adaptable, reliable, and able to work efficiently under tight deadlines while maintaining strong communication and research skills.

ExpertEnglish

Labeling Experience

Multi-Modal Data Labeling for AI Training

ImageData Collection
Worked on combined datasets involving images, text, and audio for multi-modal AI training. Performed labeling tasks such as tagging objects, classifying text context, and aligning audio data for integrated machine learning models.

Worked on combined datasets involving images, text, and audio for multi-modal AI training. Performed labeling tasks such as tagging objects, classifying text context, and aligning audio data for integrated machine learning models.

2025 - 2026

Data Labelling QA Lead

TextData Collection
Performed quality control and manual testing for multiple digital platforms, including travel, safety, e-commerce, tax, beverage, and recruitment apps, many with AI-driven components. Labeled and rated content, tested correctness of automated outputs, and annotated feedback within product management and QA sprints. Managed annotation and validation cycles for AI-powered features, providing structured data for improvement.• Supervised end-to-end product/feature validation on digital platforms incorporating AI outputs.• Structured and annotated user, transactional, and automated data sets to support AI feature fine-tuning.• Coordinated QA cycles involving AI functionality evaluation and structured user feedback curation.• Documented all evaluations and feedback in collaborative tools, reports, and sprint notes.

Performed quality control and manual testing for multiple digital platforms, including travel, safety, e-commerce, tax, beverage, and recruitment apps, many with AI-driven components. Labeled and rated content, tested correctness of automated outputs, and annotated feedback within product management and QA sprints. Managed annotation and validation cycles for AI-powered features, providing structured data for improvement.• Supervised end-to-end product/feature validation on digital platforms incorporating AI outputs.• Structured and annotated user, transactional, and automated data sets to support AI feature fine-tuning.• Coordinated QA cycles involving AI functionality evaluation and structured user feedback curation.• Documented all evaluations and feedback in collaborative tools, reports, and sprint notes.

2025 - 2025

Content Moderation and Safety Labeling

TextClassification
Reviewed and labeled content based on safety and policy guidelines, including harmful, sensitive, and inappropriate content detection. Helped train moderation models to improve platform safety and compliance. Maintained consistency in judgment across large datasets.

Reviewed and labeled content based on safety and policy guidelines, including harmful, sensitive, and inappropriate content detection. Helped train moderation models to improve platform safety and compliance. Maintained consistency in judgment across large datasets.

2024 - 2025

Data Labelling Quality Assurance Tester

DocumentData Collection
Served as a QA Tester and UX Copy Contributor, performing manual QA testing and validation of various product features for tech solutions, some related to AI-driven platforms. Tasks included validating output accuracy, labeling or rating digital content, and reviewing UX copy for alignment with AI logic. Coordinated and documented structured user feedback to improve automated systems and feature delivery.• Conducted usability reviews and functional testing via structured QA methodologies.• Directly validated outputs and responses in AI-enhanced dashboards and apps.• Participated in cross-team meetings to discuss data labeling outcomes and recommendations.• Used internal and third-party collaborative tools for annotation, feedback, and evaluation documentation.

Served as a QA Tester and UX Copy Contributor, performing manual QA testing and validation of various product features for tech solutions, some related to AI-driven platforms. Tasks included validating output accuracy, labeling or rating digital content, and reviewing UX copy for alignment with AI logic. Coordinated and documented structured user feedback to improve automated systems and feature delivery.• Conducted usability reviews and functional testing via structured QA methodologies.• Directly validated outputs and responses in AI-enhanced dashboards and apps.• Participated in cross-team meetings to discuss data labeling outcomes and recommendations.• Used internal and third-party collaborative tools for annotation, feedback, and evaluation documentation.

2023 - 2025

Audio Transcription and Speech Labeling

AudioTranscription
Transcribed audio recordings and tagged speaker segments for speech-to-text AI training. Ensured clean, time-aligned transcripts with attention to accents, background noise, and multiple speakers. Improved dataset usability for voice recognition models.

Transcribed audio recordings and tagged speaker segments for speech-to-text AI training. Ensured clean, time-aligned transcripts with attention to accents, background noise, and multiple speakers. Improved dataset usability for voice recognition models.

2023 - 2023

Education

A

Afe Babalola University

Bachelor of Engineering, Petroleum Engineering

Bachelor of Engineering
2013 - 2019

Work History

F

Fahrwunder Engineering

Head of Technical Operations and Cost Optimization Lead

Port Harcourt
2025 - 2025
H

Hacyon Innovation

Product Manager, Business Development Lead

Port Harcourt
2025 - 2025