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C

Charles Nwachukwu

Automation & Data Annotation Specialist

Nigeria flagLagos, Nigeria
$30.00/hrExpertAws SagemakerClickworkerAppen

Key Skills

Software

AWS SageMakerAWS SageMaker
ClickworkerClickworker
AppenAppen

Top Subject Matter

AI model training—text classification
sentiment analysis
and entity recognition

Top Data Types

TextText
ImageImage
AudioAudio
DocumentDocument

Top Task Types

Entity Ner Classification
Classification
Bounding Box
Segmentation
Object Detection
Text Generation
Text Summarization
Question Answering
Fine Tuning
Evaluation Rating
Computer Programming Coding
Transcription

Freelancer Overview

Automation & Data Annotation Specialist. Core strengths include Internal and Proprietary Tooling. Education includes Bachelor of Science, Federal University of Technology Owerri (FUTO) (2023). AI-training focus includes data types such as Text, Image, and Audio and labeling workflows including Entity (NER) Classification and Classification.

ExpertEnglish

Labeling Experience

Automation & Data Annotation Specialist

TextEntity Ner Classification
I managed large-scale annotation of text datasets for AI model training pipelines. My responsibilities focused on integrating data collection, labeling, and validation for tasks such as text classification and sentiment analysis. I implemented quality control and collaborated with AI engineers to refine guidelines and annotation accuracy. • Designed and executed automated workflows to streamline labeling processes. • Coordinated with engineers to review and enhance dataset quality. • Built automation tools using Python and Zapier for data ingestion and annotation. • Ensured high accuracy in labeled data for training machine learning models.

I managed large-scale annotation of text datasets for AI model training pipelines. My responsibilities focused on integrating data collection, labeling, and validation for tasks such as text classification and sentiment analysis. I implemented quality control and collaborated with AI engineers to refine guidelines and annotation accuracy. • Designed and executed automated workflows to streamline labeling processes. • Coordinated with engineers to review and enhance dataset quality. • Built automation tools using Python and Zapier for data ingestion and annotation. • Ensured high accuracy in labeled data for training machine learning models.

2024 - Present

AI Data Labeling & Automation Analyst

AudioClassification
I participated in audio data labeling for machine learning applications in NLP and voice processing. My responsibilities included structuring, labeling, and validating audio datasets to improve model training and prediction accuracy. I implemented and maintained automation tools to streamline workflow and ensure annotation consistency. • Labeled audio files for classification and training machine learning models. • Developed validation processes for labeled audio data. • Automated routine steps in audio annotation using custom scripts. • Involved in the feedback process to rectify mislabeling and improve datasets.

I participated in audio data labeling for machine learning applications in NLP and voice processing. My responsibilities included structuring, labeling, and validating audio datasets to improve model training and prediction accuracy. I implemented and maintained automation tools to streamline workflow and ensure annotation consistency. • Labeled audio files for classification and training machine learning models. • Developed validation processes for labeled audio data. • Automated routine steps in audio annotation using custom scripts. • Involved in the feedback process to rectify mislabeling and improve datasets.

2023 - 2024

AI Data Labeling & Automation Analyst

ImageClassification
I contributed to image annotation tasks to support machine learning model development. My work included the labeling and structuring of image datasets for computer vision applications. I built automated processes to increase labeling efficiency and accuracy. • Labeled image data for object and feature classification. • Automated aspects of image annotation workflow with scripting. • Supported quality assurance and consistency in annotation outputs. • Assisted in dataset review and feedback for model improvement.

I contributed to image annotation tasks to support machine learning model development. My work included the labeling and structuring of image datasets for computer vision applications. I built automated processes to increase labeling efficiency and accuracy. • Labeled image data for object and feature classification. • Automated aspects of image annotation workflow with scripting. • Supported quality assurance and consistency in annotation outputs. • Assisted in dataset review and feedback for model improvement.

2023 - 2024

AI Data Labeling & Automation Analyst

TextClassification
I labeled and structured large volumes of text data for NLP dataset preparation. My work involved organizing, cleaning, and validating text annotations to build high-quality datasets for machine learning models. I developed tools and automation to expedite and improve labeling consistency. • Performed manual and automated text data annotation and structuring. • Built pipelines to validate and clean annotated NLP datasets. • Developed internal tools for more consistent and rapid data preparation. • Participated in model review and retraining to correct inaccurate labels.

I labeled and structured large volumes of text data for NLP dataset preparation. My work involved organizing, cleaning, and validating text annotations to build high-quality datasets for machine learning models. I developed tools and automation to expedite and improve labeling consistency. • Performed manual and automated text data annotation and structuring. • Built pipelines to validate and clean annotated NLP datasets. • Developed internal tools for more consistent and rapid data preparation. • Participated in model review and retraining to correct inaccurate labels.

2023 - 2024

Education

F

Federal University of Technology Owerri (FUTO)

Bachelor of Science, Geology

Bachelor of Science
2018 - 2023

Work History

R

Razorfish

AI Data Labeling & Automation Analyst

New York
2024 - Present