Khadijat S.

Key Skills

Software

Appen

Scale AI

Top Subject Matter

Search engine evaluation

e-commerce product listings

AI response evaluation

Top Data Types

Text

Top Task Types

Classification

Freelancer Overview

Data Annotator / QA Expert at CrowdGen by Appen. Brings 8+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include Appen and Scale AI. Education includes Bachelor of Science, Ahmadu Bello University, Zaria (2023) and Master of Science, Ahmadu Bello University, Zaria (2023). AI-training focus includes data types such as Text and labeling workflows including Evaluation, Rating, and Classification.

Labeling Experience

Data Annotation Specialist at Scale AI

Scale AITextClassification

As a Data Annotation Specialist at Scale AI, I performed annotation and labeling of text datasets for AI model training. The job required adherence to strict project guidelines, collaboration with remote teams, and conducting QA reviews for consistency. My efforts enhanced dataset accuracy across various AI applications. • Annotated and categorized text data for machine learning. • Ensured high-quality training sets by following detailed instructions. • Conducted quality assurance on completed labels. • Collaborated with global annotation teams.

2022 - 2025

Data Contributor at Appen

AppenTextClassification

At Appen, I worked as a Data Contributor focused on annotation and evaluation tasks across various projects. My responsibilities included text classification, content labeling, and ensuring adherence to data privacy standards. I consistently delivered high-quality labeled outputs for multiple AI-driven initiatives. • Completed diverse annotation assignments for text and content. • Maintained strict compliance with project guidelines. • Labeled data to support AI development. • Delivered accurate results for multi-project workflows.

2020 - 2025

Data Annotator / QA Expert at CrowdGen by Appen

AppenText

As a Data Annotator and QA Expert at CrowdGen by Appen, I evaluated search engine result pairs and reviewed product listings to enhance algorithmic relevance. My work included comparing AI-generated responses for safety and factual accuracy, and performing quality checks on annotation outputs. I ensured categorization accuracy on e-commerce platforms through detailed data labeling and feedback. • Evaluated and rated search engine results for relevance. • Reviewed AI content for safety and accuracy. • Conducted quality assurance of annotation outputs. • Provided constructive feedback to improve data processes.

2020 - 2025

Education

Work History