Chukwuebuka Okafor

Key Skills

Software

Labelbox

Appen

Remotasks

Clickworker

Toloka

Top Subject Matter

Social Media

General Knowledge

Computer

Top Data Types

Image

Text

Document

Video

Audio

Top Task Types

Object Detection

Entity Ner Classification

Transcription

Classification

Question Answering

Evaluation Rating

Freelancer Overview

Freelance Data Annotation Specialist & AI Training Contributor. Brings 3+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Remotasks, Appen, and Clickworker. Education includes Bachelor of Science, University of Port Harcourt (2021). AI-training focus includes data types such as Image, Text, and Audio and labeling workflows including Object Detection, Entity (NER) Classification, and Transcription.

Labeling Experience

Freelance Data Annotation Specialist & AI Training Contributor

RemotasksTextClassification

My responsibilities included content categorization and moderation of user-generated text submissions to ensure compliance with platform guidelines and safety standards. Using platforms such as Remotasks and Appen, I reviewed more than 8,000 text content items, identifying and classifying inappropriate or harmful material. This role required a high level of attention to detail and strong understanding of cultural sensitivity requirements. • Evaluated and processed large volumes of user content in real time. • Implemented strict adherence to moderation policies and classification rubrics. • Collaborated with remote client teams and reported flagged content as required. • Contributed to safer and higher-quality online user experiences.

My responsibilities included content categorization and moderation of user-generated text submissions to ensure compliance with platform guidelines and safety standards. Using platforms such as Remotasks and Appen, I reviewed more than 8,000 text content items, identifying and classifying inappropriate or harmful material. This role required a high level of attention to detail and strong understanding of cultural sensitivity requirements. • Evaluated and processed large volumes of user content in real time. • Implemented strict adherence to moderation policies and classification rubrics. • Collaborated with remote client teams and reported flagged content as required. • Contributed to safer and higher-quality online user experiences.

2022 - Present

Freelance Data Annotation Specialist & AI Training Contributor

ClickworkerText

I evaluated and rated search engine result pages (SERP) to assess the quality, relevance, and accuracy of algorithmic outputs for machine learning optimization. This work aimed at improving the effectiveness of search algorithms and user experience across domains by detailed assessment and web research. Over 3,000+ SERP evaluations were performed for quality benchmarking. • Consistently followed platform-specific guidelines for unbiased rating and evaluation. • Applied judgment to determine result quality and content appropriateness. • Provided feedback that influenced algorithm updates and improvements. • Maintained detailed records of evaluation outcomes and rationales.

I evaluated and rated search engine result pages (SERP) to assess the quality, relevance, and accuracy of algorithmic outputs for machine learning optimization. This work aimed at improving the effectiveness of search algorithms and user experience across domains by detailed assessment and web research. Over 3,000+ SERP evaluations were performed for quality benchmarking. • Consistently followed platform-specific guidelines for unbiased rating and evaluation. • Applied judgment to determine result quality and content appropriateness. • Provided feedback that influenced algorithm updates and improvements. • Maintained detailed records of evaluation outcomes and rationales.

2022 - Present

Freelance Data Annotation Specialist & AI Training Contributor

AppenAudioTranscription

I performed manual transcription of audio and video data for use in speech recognition and natural language processing models. Delivering over 95% accuracy, I transcribed more than 200 hours of content from various industries for clients on platforms such as Appen and Outlier. My work contributed to the development of more robust automatic speech recognition systems. • Managed and delivered transcription projects across different dialects and audio qualities. • Ensured compliance with accuracy standards and client-specific transcription guidelines. • Supported machine learning teams with high-quality, structured audio transcripts. • Coordinated with remote teams to meet project deadlines and quality benchmarks.

I performed manual transcription of audio and video data for use in speech recognition and natural language processing models. Delivering over 95% accuracy, I transcribed more than 200 hours of content from various industries for clients on platforms such as Appen and Outlier. My work contributed to the development of more robust automatic speech recognition systems. • Managed and delivered transcription projects across different dialects and audio qualities. • Ensured compliance with accuracy standards and client-specific transcription guidelines. • Supported machine learning teams with high-quality, structured audio transcripts. • Coordinated with remote teams to meet project deadlines and quality benchmarks.

2022 - Present

Freelance Data Annotation Specialist & AI Training Contributor

AppenTextEntity Ner Classification

I was responsible for labeling and annotating large volumes of text data with named entities, sentiment, and classifications for training advanced natural language models. Projects covered a variety of domains including sentiment analysis, social media post labeling, and content moderation. My consistent output upheld accuracy benchmarks above 95% on leading platforms like Appen and Clickworker. • Labeled and categorized over 5,000 social media texts for multilingual sentiment analysis projects. • Conducted entity recognition and text classification in support of multi-domain machine learning initiatives. • Adapted quickly to guideline shifts and worked across remote, international teams. • Maintained precise documentation and performance tracking of annotation output.

I was responsible for labeling and annotating large volumes of text data with named entities, sentiment, and classifications for training advanced natural language models. Projects covered a variety of domains including sentiment analysis, social media post labeling, and content moderation. My consistent output upheld accuracy benchmarks above 95% on leading platforms like Appen and Clickworker. • Labeled and categorized over 5,000 social media texts for multilingual sentiment analysis projects. • Conducted entity recognition and text classification in support of multi-domain machine learning initiatives. • Adapted quickly to guideline shifts and worked across remote, international teams. • Maintained precise documentation and performance tracking of annotation output.

2022 - Present

Freelance Data Annotation Specialist & AI Training Contributor

RemotasksImageObject Detection

As a Freelance Data Annotation Specialist and AI Training Contributor, I executed complex image annotation tasks supporting machine learning model training. My work included object detection, semantic segmentation, and precise categorization using platforms such as Remotasks, Appen, and Outlier. I consistently maintained over 95% accuracy and delivered 15,000+ completed image-related tasks across multiple industries. • Performed high-volume image annotation for diverse projects including autonomous vehicles and retail analytics. • Utilized advanced annotation techniques such as bounding boxes and image segmentation. • Trained and adapted to evolving project guidelines and strict quality metrics. • Worked with proprietary and commercial tools to deliver reliable, high-quality annotated data.

As a Freelance Data Annotation Specialist and AI Training Contributor, I executed complex image annotation tasks supporting machine learning model training. My work included object detection, semantic segmentation, and precise categorization using platforms such as Remotasks, Appen, and Outlier. I consistently maintained over 95% accuracy and delivered 15,000+ completed image-related tasks across multiple industries. • Performed high-volume image annotation for diverse projects including autonomous vehicles and retail analytics. • Utilized advanced annotation techniques such as bounding boxes and image segmentation. • Trained and adapted to evolving project guidelines and strict quality metrics. • Worked with proprietary and commercial tools to deliver reliable, high-quality annotated data.

2022 - Present

Education

Work History