Chinonye Ezenwata

Key Skills

Software

Appen

Clickworker

Lionbridge

Mercor

Mindrift

OneForma

SuperAnnotate

Telus

Top Subject Matter

No subject matter listed

Top Data Types

Audio

Image

Text

Video

Top Label Types

Action Recognition

Bounding Box

Data Collection

Emotion Recognition

Evaluation Rating

RLHF

Text Generation

Transcription

Translation Localization

Freelancer Overview

I am an experienced AI Data Annotator and LLM Evaluation Specialist with over five years working on high-impact projects in NLP, computer vision, and supervised machine learning. My expertise includes Reinforcement Learning from Human Feedback (RLHF), Supervised Fine-Tuning (SFT), side-by-side response ranking, reward modeling, and AI safety evaluation. I have consistently delivered 98% annotation accuracy in gold-standard audits, with hands-on experience in tasks like hallucination and bias detection, red teaming, chain-of-thought reasoning analysis, and structured dataset preparation. I am proficient with tools such as Label Studio, CVAT, Doccano, Scale AI, and Remotasks, and have contributed to both the creation and quality assurance of datasets powering advanced AI systems. My background also includes collaborating with machine learning engineers to refine annotation guidelines and improve model performance, ensuring high-quality data for robust and ethical AI development.

Labeling Experience

Linguistics and Data Quality Analyst

TelusTextTranslation LocalizationRLHF

Validated annotated datasets for linguistic precision and contextual correctness. • Reviewed AI outputs for grammar, fluency, and compliance with content policies. • Contributed to development of Gold Standard datasets for automated QA evaluation

Validated annotated datasets for linguistic precision and contextual correctness. • Reviewed AI outputs for grammar, fluency, and compliance with content policies. • Contributed to development of Gold Standard datasets for automated QA evaluation

2019 - 2020

Education

Work History