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Timothy Opara

Timothy Opara

AI Data Annotation Specialist - Technology & Internet

NIGERIA flag
Port Harcourt, Nigeria
$15.00/hrIntermediateAppenClickworkerCVAT

Key Skills

Software

AppenAppen
ClickworkerClickworker
CVATCVAT
Data Annotation TechData Annotation Tech
LionbridgeLionbridge
Other

Top Subject Matter

No subject matter listed

Top Data Types

TextText

Top Label Types

Bounding Box
Classification
Evaluation Rating
Prompt Response Writing SFT

Freelancer Overview

I am a detail-oriented AI data annotation specialist with experience in text annotation, search relevance evaluation (ESCI), and AI response evaluation for large language model training. My work includes classifying text datasets, rating AI-generated responses, and ensuring high-quality labeled data for machine learning systems. I have experience with e-commerce data projects involving product data entry, web research, and dataset preparation. I also have a background in phonetic transcription and linguistic classification using British English IPA. I am highly skilled at following complex annotation guidelines, maintaining dataset accuracy, and performing quality checks to ensure consistent results. My goal is to support AI teams by delivering reliable, well-structured training data for machine learning models.

IntermediateEnglish

Labeling Experience

Search Relevance & Content Classification for AI Training

OtherTextClassificationEvaluation Rating
Performed search relevance evaluation and text classification tasks to improve AI search systems. Responsibilities included labeling query-result pairs, identifying relevant search outcomes, and ensuring dataset consistency according to annotation guidelines. Maintained high accuracy through detailed quality checks and guideline compliance.

Performed search relevance evaluation and text classification tasks to improve AI search systems. Responsibilities included labeling query-result pairs, identifying relevant search outcomes, and ensuring dataset consistency according to annotation guidelines. Maintained high accuracy through detailed quality checks and guideline compliance.

2024 - 2025

AI Text Annotation & Search Relevance Evaluation for LLM Training

OtherTextClassificationEvaluation Rating
Worked on AI data annotation and evaluation tasks to improve the performance of large language models. Responsibilities included labeling and classifying text data, evaluating AI-generated responses for quality and relevance, and performing search relevance assessments. Tasks also involved comparing multiple AI responses, identifying the most helpful outputs, and providing feedback to improve model accuracy. Maintained strict adherence to project guidelines, ensuring consistency and high-quality annotations. Quality control measures included reviewing instructions carefully, performing self-checks before submission, and maintaining high accuracy across tasks. The work contributed to building reliable datasets used for training and fine-tuning machine learning models.

Worked on AI data annotation and evaluation tasks to improve the performance of large language models. Responsibilities included labeling and classifying text data, evaluating AI-generated responses for quality and relevance, and performing search relevance assessments. Tasks also involved comparing multiple AI responses, identifying the most helpful outputs, and providing feedback to improve model accuracy. Maintained strict adherence to project guidelines, ensuring consistency and high-quality annotations. Quality control measures included reviewing instructions carefully, performing self-checks before submission, and maintaining high accuracy across tasks. The work contributed to building reliable datasets used for training and fine-tuning machine learning models.

2024 - 2025

Education

R

Rivers State University

Bachelor of Science, Accountancy

Bachelor of Science
2008 - 2013

Work History

O

Olive Cook Limited

Accountant and Acting Administrative Manager

Port Harcourt
2015 - 2022