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Joseph Onyejiaka

Joseph Onyejiaka

Personal Assistant

Nigeria flagEnugu, Nigeria
$5.00/hrIntermediateAppenClickworkerImerit

Key Skills

Software

AppenAppen
ClickworkerClickworker
iMeritiMerit
OneFormaOneForma
MindriftMindrift
MercorMercor
Micro1
RemotasksRemotasks
TolokaToloka
TelusTelus

Top Subject Matter

Technology
Healthcare
Finnance

Top Data Types

VideoVideo
ImageImage
AudioAudio

Top Task Types

Bounding BoxBounding Box
PolygonPolygon
SegmentationSegmentation
Object DetectionObject Detection
Text GenerationText Generation
Question AnsweringQuestion Answering
Text SummarizationText Summarization

Freelancer Overview

Personal Assistant. Brings 4+ years of professional experience across complex professional workflows, research, and quality-focused execution. Education includes Bachelor of Science, Enugu State University of Science and Technology (2023).

IntermediateEnglishIgbo

Labeling Experience

AI training

ImageQuestion Answering
I worked on data labeling projects focused on training and improving machine learning models, particularly in natural language processing (NLP) and content moderation. The scope involved annotating large datasets to help models better understand context, intent, and accuracy in real-world scenarios. Specific Data Labeling Tasks Performed: Labeled text data for sentiment analysis (positive, negative, neutral) Annotated conversational data for intent classification and entity recognition Reviewed and categorized user-generated content for policy compliance (e.g., spam, harmful content) Performed ranking tasks by comparing multiple AI-generated responses and selecting the most relevant or accurate one Carried out data validation and correction to improve annotation consistency Project Size: Worked on datasets ranging from 5,000 to 20,000+ data points per project Completed hundreds to thousands of annotations per week, depending on task complexity Collaborated within a distributed team where outputs contributed to large-scale model training pipelines Quality Measures Adhered To: Followed detailed annotation guidelines to ensure consistency and accuracy Maintained high agreement scores with benchmark/ground truth data

I worked on data labeling projects focused on training and improving machine learning models, particularly in natural language processing (NLP) and content moderation. The scope involved annotating large datasets to help models better understand context, intent, and accuracy in real-world scenarios. Specific Data Labeling Tasks Performed: Labeled text data for sentiment analysis (positive, negative, neutral) Annotated conversational data for intent classification and entity recognition Reviewed and categorized user-generated content for policy compliance (e.g., spam, harmful content) Performed ranking tasks by comparing multiple AI-generated responses and selecting the most relevant or accurate one Carried out data validation and correction to improve annotation consistency Project Size: Worked on datasets ranging from 5,000 to 20,000+ data points per project Completed hundreds to thousands of annotations per week, depending on task complexity Collaborated within a distributed team where outputs contributed to large-scale model training pipelines Quality Measures Adhered To: Followed detailed annotation guidelines to ensure consistency and accuracy Maintained high agreement scores with benchmark/ground truth data

2024 - 2026

Education

E

Enugu State University of Science and Technology

Bachelor of Science, Applied Microbiology

Bachelor of Science
2019 - 2023

Work History

E

Enugu State Water Corporation

Personal Assistant

Enugu
2024 - Present
P

Pieta Hospital and Maternity

Virtual Assistant

Onitsha
2023 - 2024