I'm Johnson Makala Ngui, an AI Data Annotator and Reviewer with over 5 years of hands-on experience on large-scale Generative AI and machine learning training projects. I specialize in text, image, video, and multimodal annotation, prompt-response evaluation, and quality assurance, with a strong understanding of annotation guidelines, model behavior, and reviewer-level quality control across production AI systems. In roles at Avala AI, Outlier AI, and Remotasks, I have consistently delivered high-quality datasets, identified ambiguous or unsafe outputs, and provided actionable feedback to teammates while maintaining throughput and strict quality standards. I thrive in instruction-heavy, rule-based workflows and bring meticulous attention to detail and consistency to every project.

JOHNSON MKALA NGUI

I'm Johnson Makala Ngui, an AI Data Annotator and Reviewer with over 5 years of hands-on experience on large-scale Generative AI and machine learning training projects. I specialize in text, image, video, and multimodal annotation, prompt-response evaluation, and quality assurance, with a strong understanding of annotation guidelines, model behavior, and reviewer-level quality control across production AI systems. In roles at Avala AI, Outlier AI, and Remotasks, I have consistently delivered high-quality datasets, identified ambiguous or unsafe outputs, and provided actionable feedback to teammates while maintaining throughput and strict quality standards. I thrive in instruction-heavy, rule-based workflows and bring meticulous attention to detail and consistency to every project.

Available to hire

I’m Johnson Makala Ngui, an AI Data Annotator and Reviewer with over 5 years of hands-on experience on large-scale Generative AI and machine learning training projects. I specialize in text, image, video, and multimodal annotation, prompt-response evaluation, and quality assurance, with a strong understanding of annotation guidelines, model behavior, and reviewer-level quality control across production AI systems.

In roles at Avala AI, Outlier AI, and Remotasks, I have consistently delivered high-quality datasets, identified ambiguous or unsafe outputs, and provided actionable feedback to teammates while maintaining throughput and strict quality standards. I thrive in instruction-heavy, rule-based workflows and bring meticulous attention to detail and consistency to every project.

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Experience Level

Language

English
Advanced

Work Experience

AI Data Annotator / Reviewer at Avala AI
January 1, 2024 - June 1, 2025
Annotated and reviewed high-complexity datasets used in training generative AI models; evaluated model outputs for accuracy, reasoning quality, policy compliance, and safety; served in a reviewer role, validating other annotators' work and providing corrective feedback; ensured consistent application of detailed annotation guidelines; flagged ambiguous, biased, or unsafe outputs for escalation; maintained high throughput while meeting strict quality benchmarks.
AI Data Annotator / Reviewer at Outlier AI
January 1, 2023 - September 1, 2023
Performed prompt-response ranking, rewriting, and evaluation for LLM training; reviewed AI-generated outputs for factual correctness and logical coherence; identified hallucinations, instruction violations, and low-quality responses; participated in peer review workflows to improve dataset reliability; demonstrated strong performance consistency across evolving task guidelines.
AI Data Annotator at Remotasks
September 1, 2022 - September 1, 2023
Labeled large-scale datasets for NLP and computer vision tasks; completed text, image, and video annotation assignments with high accuracy; worked on 2D and 3D annotation tasks, including classification and validation; followed strict task instructions and quality control standards; consistently met productivity and accuracy targets.

Education

Bachelor’s Degree in Applied Computer Science at Chuka University
January 11, 2030 - June 9, 2026

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Professional Services