Dennis Ombachi

Key Skills

Software

Appen

Top Subject Matter

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Top Data Types

Text

Top Label Types

Classification

Evaluation Rating

Freelancer Overview

I am a detail-oriented AI data specialist with over two years of hands-on experience in data annotation, labeling, and AI model training. My work has focused on natural language processing tasks, including text classification, intent labeling, prompt engineering, and AI response evaluation. I have a strong track record of following detailed guidelines to deliver high-quality, accurate annotations and feedback that improve AI model performance. I am skilled in using a variety of AI training and annotation platforms, as well as Google Docs and research tools, and I consistently meet strict quality and deadline requirements in remote settings. I am passionate about ensuring data accuracy, reducing model hallucinations, and enhancing the reliability of AI systems.

Labeling Experience

Freelance AI Trainer

AppenTextEvaluation Rating

Evaluated AI model outputs for errors, bias, and inconsistencies as part of model improvement tasks. Applied annotation standards to support model reliability and understanding. Provided structured feedback on AI performance adhering to project guidelines. • Assessed model outputs for relevance and accuracy. • Identified sources of bias and proposed corrections. • Enhanced data quality through iterative review. • Maintained thorough documentation on model evaluation findings.

Evaluated AI model outputs for errors, bias, and inconsistencies as part of model improvement tasks. Applied annotation standards to support model reliability and understanding. Provided structured feedback on AI performance adhering to project guidelines. • Assessed model outputs for relevance and accuracy. • Identified sources of bias and proposed corrections. • Enhanced data quality through iterative review. • Maintained thorough documentation on model evaluation findings.

2023

Freelance Data Labeler / AI Data Annotator

AppenTextClassification

Labeled and annotated large volumes of text data for AI and machine learning training projects. Performed text classification, intent labeling, sentiment analysis, and response ranking by following strict annotation guidelines. Conducted quality assurance checks to ensure accuracy and consistency in labeled datasets. • Delivered high-accuracy labeled data according to project specifications. • Collaborated with remote QA teams to incorporate feedback. • Met daily and weekly productivity targets while maintaining high accuracy scores. • Cleaned datasets by detecting and correcting annotation errors.

Labeled and annotated large volumes of text data for AI and machine learning training projects. Performed text classification, intent labeling, sentiment analysis, and response ranking by following strict annotation guidelines. Conducted quality assurance checks to ensure accuracy and consistency in labeled datasets. • Delivered high-accuracy labeled data according to project specifications. • Collaborated with remote QA teams to incorporate feedback. • Met daily and weekly productivity targets while maintaining high accuracy scores. • Cleaned datasets by detecting and correcting annotation errors.

2023

Education

Work History