Ajagu N.

Key Skills

Software

Appen

Scale AI

Top Subject Matter

Large Language Models

Machine Learning (Multimodal)

Top Data Types

Text

Image

Top Task Types

Classification

Freelancer Overview

AI Model Evaluation Specialist. Brings 2+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Scale AI. Education includes General Certificate of Education, Benviator Secondary School (2013) and Bachelor of Science, Federal University of Portharcourt (2019). AI-training focus includes data types such as Text and labeling workflows including Evaluation, Rating, and Classification.

Labeling Experience

AI Model Evaluation Specialist

AppenText

As an AI Model Evaluation Specialist at Appen, I assessed and rated outputs from large language models to improve response accuracy, relevance, and safety. I provided detailed feedback to refine model behavior using human-in-the-loop evaluation techniques. I contributed to iterative model improvement by delivering structured evaluation reports and insights. • Evaluated model-generated responses for quality and compliance • Identified gaps such as bias and factual inaccuracy • Applied RLHF methodologies to drive improvements • Enhanced AI system reliability through structured insights

2025 - Present

AI Training & Quality Assurance Analyst

Scale AIText

As an AI Training & Quality Assurance Analyst at Scale AI, I reviewed AI-generated responses to ensure alignment with task instructions and desired outcomes. I conducted quality assurance on datasets to eliminate errors and improve overall data reliability. My feedback contributed to the continuous refinement of AI models and training datasets. • Assessed labeled data and model outputs for alignment • Suggested corrections and refinements through targeted feedback • Conducted detailed error analysis and provided improvement strategies • Maintained rigorous standards for data integrity and model performance

2023 - 2025

Data Annotation Specialist (Multimodal)

Scale AITextClassification

As a Data Annotation Specialist (Multimodal) at Scale AI, I labeled and annotated text, image, and audio datasets for machine learning model training. I followed strict annotation guidelines to ensure high-quality and consistent data outputs. I performed quality checks and validation to maintain dataset accuracy and integrity. • Labeled multimodal datasets, including text, images, and audio • Collaborated to adapt annotation practices to evolving project needs • Conducted quality assurance on labeled data • Supported scalability by adhering to best annotation practices

2021 - 2023

Education

Work History