John Gakuru Maina

Available to hire

I’m a motivated AI trainer and content evaluator with hands-on experience in data annotation, model testing, and quality review for text, image, and voice-based systems.

About

I’m a motivated AI trainer and content evaluator with hands-on experience in data annotation, model testing, and quality review for text, image, and voice-based systems. With a background in Computer Science and a strong command of English, I focus on accuracy, clarity, and ethical AI development. Passionate about technology and continuous learning, I aim to contribute to projects that make artificial intelligence smarter and more human-centered.

  • 2 years' experience
  • Joined November 2025

Languages

  • EnglishFluent
  • SwahiliFluent

Industry experience

  • Education
  • Software & Internet
  • Professional Services
  • Computers & Electronics
  • Media & Entertainment

Work experience

English Tutor and Content Reviewer · Nairobi, KenyaDec 2023 – Dec 2023 · 1 mo

Taught English communication and writing skills to students online. Reviewed and corrected written content for grammar, coherence, and readability. Built strong communication and teaching experience that supports AI language evaluation work.

Freelance AI Trainer and Evaluator · RemoteJan 2023 – Nov 2025 · 2 yrs 11 mos

Annotate and review data sets including text, audio, and images used to train AI models. Evaluate AI-generated outputs for accuracy, tone, and quality. Participate in rating, categorization, and content moderation tasks. Test and provide feedback on model responses to improve natural understanding.

Education

Diploma in Computer Science · University of Nairobi2020 – 2023
KCSE (Kenya Certificate of Secondary Education) · Murang’a High School2019
KCPE (Kenya Certificate of Primary Education) · Kamandio Primary School2014

Certifications and awards

Certificate in Computer Applications2015 – 2016
Certificate in Data Annotation and AI Fundamentals – Coursera2022 – 2024
Certificate in English Language Evaluation and Prompt Review – Online2025
Trained in AI Ethics, Responsible Data Handling, and Remote Work Collaboration2020 – 2024

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