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I am an AI-focused QA and data specialist with proven experience across uTest, Test IO, Toloka, Remotasks, Appen, and Outlier. I deliver high-accuracy annotations, prompt evaluations, and defect reports that directly improve model performance and product quality. I am known for strict guideline adherence, consistency under volume, and clear, actionable feedback.…

EKWEZUO TOCHUKWU

QA Engineer, Data Annotator, AI Engineer, +3

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I am an AI-focused QA and data specialist with proven experience across uTest, Test IO, Toloka, Remotasks, Appen, and Outlier. I deliver high-accuracy annotations, prompt evaluations, and defect reports that directly improve model performance and product quality. I am known for strict guideline adherence, consistency under volume, and clear, actionable feedback.…

Available to hire

I am an AI-focused QA and data specialist with proven experience across uTest, Test IO, Toloka, Remotasks, Appen, and Outlier.

I deliver high-accuracy annotations, prompt evaluations, and defect reports that directly improve model performance and product quality. I am known for strict guideline adherence, consistency under volume, and clear, actionable feedback.

Skills

AI Data Labelling

AI Collection (Video)

AI Collection (Audio)

Data Visualization

Experience Level

AI Data Labelling

Expert

AI Collection (Video)

Expert

AI Collection (Audio)

Expert

Data Visualization

Intermediate

Language

English

Fluent

Work Experience

Freelance AI Data Annotator & Evaluator at Self-employed / Freelance

January 1, 2023 - Present

Annotated and labeled large-scale datasets (text, audio, and image) to support supervised learning pipelines. Ranked and compared AI responses using strict rubrics (accuracy, relevance, safety, instruction-following). Maintained consistent quality across high-volume tasks while meeting tight SLAs and daily quotas. Wrote clear rationales to justify labels, improving dataset reliability and reviewer agreement. Identified edge cases and ambiguity in guidelines; flagged issues to improve annotation standards.

QA Tester at uTest / Test IO / Tester Work

January 1, 2023 - Present

Executed manual and exploratory testing on web/mobile apps across multiple devices and OS versions. Filed high-quality bug reports with reproducible steps, logs, screenshots, and severity prioritization. Designed and executed test cases to validate functionality and reduce regression defects. Collaborated in global cycles, aligning with test leads and developers to resolve issues faster. Improved usability through actionable feedback on UX flows and edge-case scenarios.

QA Tester (uTest /Test.io /Tester Work) at uTest / Test IO / Tester Work

January 1, 2023 - Present