Vivian Mwendwa

Key Skills

Software

Other

Top Subject Matter

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Top Data Types

Image

Top Label Types

Bounding Box

Freelancer Overview

I am an experienced AI trainer and data annotation specialist with a strong background in training and evaluating large language models (LLMs) and computer vision systems. My expertise includes designing and refining prompts for LLMs, conducting human-in-the-loop model evaluations, and performing high-precision data labeling across NLP and computer vision domains, such as text classification, bounding boxes, and image segmentation. I have a proven track record in developing structured rubrics, optimizing annotation workflows, and ensuring data quality through rigorous calibration and inter-annotator agreement validation. My hands-on experience spans remote global teams, where I consistently deliver high-quality datasets and drive model performance improvements through iterative feedback and quality assurance processes. I am also skilled in Python, SQL, and data validation, and have a strong understanding of data protection and compliance principles.

Labeling Experience

Education

Work History