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Oluwagbayi Oni

Oluwagbayi Oni

Quality Assurance Specialist - Data Annotation

NIGERIA flag
Ibadan, Nigeria
$6.00/hrExpertInternal Proprietary Tooling

Key Skills

Software

Internal/Proprietary Tooling

Top Subject Matter

No subject matter listed

Top Data Types

TextText

Top Label Types

RLHF

Freelancer Overview

I am a detail-oriented Data Annotation Specialist with over six years of hands-on experience supporting the development of machine learning models in computer vision and natural language processing domains. My expertise spans image classification, semantic segmentation, LiDAR/3D point cloud annotation, sentiment analysis, named entity recognition (NER), and audio transcription. I have a strong track record of maintaining 98%+ accuracy while meeting tight deadlines, utilizing industry-standard tools like Labelbox, CVAT, Prodigy, and Amazon SageMaker Ground Truth. My experience includes both individual and team-based annotation, quality assurance audits, and refining annotation guidelines to improve efficiency and reduce errors. I thrive in collaborative environments, working closely with data scientists and ML engineers to deliver high-quality, scalable datasets that drive robust AI solutions. My attention to detail, adaptability, and commitment to quality make me a valuable contributor to any data labeling or AI training data project.

ExpertEnglishYoruba

Labeling Experience

RLHF Quality Assurance: Hallucination Detection & Logic Refinement

Internal Proprietary ToolingTextRLHF
In this project, I performed deep-dive Quality Assurance on a dataset of 500+ LLM (Large Language Model) responses to ensure they met strict 'Gold-Standard' requirements for model training. Key Contributions: Hallucination Mitigation: Identified and corrected factual errors in model outputs by cross-referencing multi-source data. Reasoning Alignment: Audited 'Chain-of-Thought' responses to ensure the step-by-step logic remained consistent from prompt to final answer. Preference Ranking: Evaluated and scored multiple model variations based on helpfulness, honesty, and harmlessness (HHH) criteria. SOP Compliance: Maintained a 98%+ accuracy rate while adhering to complex, evolving annotation guidelines. The Result: The refined dataset provided the model with clearer, more logical training signals, directly reducing the frequency of contradictory or 'vague' AI responses.

In this project, I performed deep-dive Quality Assurance on a dataset of 500+ LLM (Large Language Model) responses to ensure they met strict 'Gold-Standard' requirements for model training. Key Contributions: Hallucination Mitigation: Identified and corrected factual errors in model outputs by cross-referencing multi-source data. Reasoning Alignment: Audited 'Chain-of-Thought' responses to ensure the step-by-step logic remained consistent from prompt to final answer. Preference Ranking: Evaluated and scored multiple model variations based on helpfulness, honesty, and harmlessness (HHH) criteria. SOP Compliance: Maintained a 98%+ accuracy rate while adhering to complex, evolving annotation guidelines. The Result: The refined dataset provided the model with clearer, more logical training signals, directly reducing the frequency of contradictory or 'vague' AI responses.

2025

Education

L

Ladoke Akintola University of Technology

Doctor of Philosophy, Environmental and Industrial Sculpture

Doctor of Philosophy
2025 - 2025
L

Ladoke Akintola University of Technology

Master of Technology, Environmental and Industrial Sculpture

Master of Technology
2020 - 2024

Work History

B

Bethel American International School

Graphic Design Specialist/Creative Arts Tutor

Ibadan
2017 - 2023
F

Figures and Structures

Freelance Graphic Artist

Lagos
2013 - 2017