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John Theophilous

John Theophilous

Key Skills

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Freelancer Overview

I am a detail-oriented Data Annotation and Evaluation Specialist with proven expertise in AI model evaluation, side-by-side (SxS) comparisons, and high-precision data labeling for computer vision and generative AI projects. My experience spans large-scale international assignments with platforms such as Luma, Scale AI, and Appen, where I consistently achieved 98–99% accuracy in object detection, image/video annotation, and semantic alignment tasks. I am skilled in using tools like CVAT, Labelbox, SuperAnnotate, and VGG Image Annotator to deliver accurate, high-quality training data. My strengths include error detection, fact-checking, and quality assurance, and I am passionate about improving AI performance through meticulous data preparation and annotation.

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Education

U

Usmanu Danfodiyo University, Sokoto

Bachelor of Education, Education Economics

Bachelor of Education
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Work History

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