Sylvanus Okafor

Key Skills

Software

Remotasks

Appen

Clickworker

Top Subject Matter

General Machine Learning/AI Training Data

Search Engine Evaluation/AI Model Training

Web Content Moderation & E-commerce Data Annotation

Top Data Types

Image

Text

Document

Top Task Types

Bounding Box

Classification

Evaluation Rating

Transcription

Data Collection

Prompt Response Writing SFT

Text Generation

Text Summarization

Question Answering

Freelancer Overview

AI Data Annotator & Tasker (Freelance) with 3+ years of hands-on experience across leading platforms including Remotasks, Appen, and Clickworker. Core strength include data classification, text annotation, content moderation, quality assurance, and microtask execution. Known for accuracy, attention to detail, and consistent high-quality output across complex AI training workflow. Education includes a Bachelor of Science from the University of Nigeria, Nsukka (2018) and a Master of Educational Psychology from Nasarawa State University, Keffi (in progress, 2024-present). I believe this strong academic background in research, analytical thinking, and structured communication directly supports high-quality performance in data annotation, content evaluation, and AI response rating tasks

Labeling Experience

Search Engine Evaluator & Data Contributor (Freelance)

AppenText

As a Search Engine Evaluator & Data Contributor, I evaluated web search results and provided structured feedback for AI model improvement. I rated ads, news snippets, and landing pages for quality, policy compliance, and relevance. I contributed to multiple ongoing projects and consistently met daily quotas. • Evaluated text search results and online content for relevance and quality • Provided feedback on AI-generated outputs to enhance model performance • Followed structured guidelines for rating and task completion • Maintained accuracy and high performance across varied projects.

As a Search Engine Evaluator & Data Contributor, I evaluated web search results and provided structured feedback for AI model improvement. I rated ads, news snippets, and landing pages for quality, policy compliance, and relevance. I contributed to multiple ongoing projects and consistently met daily quotas. • Evaluated text search results and online content for relevance and quality • Provided feedback on AI-generated outputs to enhance model performance • Followed structured guidelines for rating and task completion • Maintained accuracy and high performance across varied projects.

2023 - Present

Microtask Specialist & Content Moderator (Freelance)

ClickworkerTextClassification

In the role of Microtask Specialist & Content Moderator, I carried out text categorisation, product labelling, and survey validation tasks. I ensured user-generated content met quality and policy standards through moderation activities. I participated in diverse data collection and annotation projects, maintaining a strong reputation for quality. • Completed content categorisation and product labelling tasks • Moderated textual data to enforce policy compliance • Performed data collection and e-commerce product annotation • Participated in survey validation and web research assignments.

In the role of Microtask Specialist & Content Moderator, I carried out text categorisation, product labelling, and survey validation tasks. I ensured user-generated content met quality and policy standards through moderation activities. I participated in diverse data collection and annotation projects, maintaining a strong reputation for quality. • Completed content categorisation and product labelling tasks • Moderated textual data to enforce policy compliance • Performed data collection and e-commerce product annotation • Participated in survey validation and web research assignments.

2022 - Present

AI Data Annotator & Tasker (Freelance)

RemotasksImageBounding Box

As an AI Data Annotator and Tasker, I performed image annotation, bounding box labeling, and semantic segmentation for machine learning datasets. I reviewed and rated AI-generated responses to ensure adherence to quality and guidelines. My work required a deep attention to detail and consistent output quality above benchmarks. • Completed bounding box labeling and semantic segmentation for diverse image sets • Rated and evaluated machine learning outputs for accuracy and quality • Followed detailed annotation and guidelines to ensure consistency • Maintained high quality scores and met project performance indicators.

As an AI Data Annotator and Tasker, I performed image annotation, bounding box labeling, and semantic segmentation for machine learning datasets. I reviewed and rated AI-generated responses to ensure adherence to quality and guidelines. My work required a deep attention to detail and consistent output quality above benchmarks. • Completed bounding box labeling and semantic segmentation for diverse image sets • Rated and evaluated machine learning outputs for accuracy and quality • Followed detailed annotation and guidelines to ensure consistency • Maintained high quality scores and met project performance indicators.

2022 - Present

Education

Work History