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Hi, I'm Kelvin Mwangi, a Remote Data Specialist and AI Trainer with 3+ years of experience supporting global clients through accurate data annotation, AI training, research, and virtual assistance. I've completed 140+ Upwork projects with consistent 5-star ratings for precision, communication, and on-time delivery. I excel at managing large-scale datasets, maintaining strict QA standards, and adapting quickly across AI/ML, SaaS, marketing, and healthcare environments.…Hi, I'm Kelvin Mwangi, a Remote Data Specialist and AI Trainer with 3+ years of experience supporting global clients through accurate data annotation, AI training, research, and virtual assistance. I've completed 140+ Upwork projects with consistent 5-star ratings for precision, communication, and on-time delivery. I excel at managing large-scale datasets, maintaining strict QA standards, and adapting quickly across AI/ML, SaaS, marketing, and healthcare environments.

Kelvin Mwangi

Data Scientist, Data Annotator, AI Engineer, +2

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Hi, I'm Kelvin Mwangi, a Remote Data Specialist and AI Trainer with 3+ years of experience supporting global clients through accurate data annotation, AI training, research, and virtual assistance. I've completed 140+ Upwork projects with consistent 5-star ratings for precision, communication, and on-time delivery. I excel at managing large-scale datasets, maintaining strict QA standards, and adapting quickly across AI/ML, SaaS, marketing, and healthcare environments.…Hi, I'm Kelvin Mwangi, a Remote Data Specialist and AI Trainer with 3+ years of experience supporting global clients through accurate data annotation, AI training, research, and virtual assistance. I've completed 140+ Upwork projects with consistent 5-star ratings for precision, communication, and on-time delivery. I excel at managing large-scale datasets, maintaining strict QA standards, and adapting quickly across AI/ML, SaaS, marketing, and healthcare environments.

Available to hire

Hi, I’m Kelvin Mwangi, a Remote Data Specialist and AI Trainer with 3+ years of experience supporting global clients through accurate data annotation, AI training, research, and virtual assistance.

I’ve completed 140+ Upwork projects with consistent 5-star ratings for precision, communication, and on-time delivery. I excel at managing large-scale datasets, maintaining strict QA standards, and adapting quickly across AI/ML, SaaS, marketing, and healthcare environments.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Work Experience

AI Training & Data Annotation Specialist (Remote) at Futuri Media / Outlier / Remotasks

January 1, 2021 - January 1, 2025

Trained and evaluated AI models using high-accuracy data annotation; reviewed and structured datasets to improve model reliability; applied strict QA guidelines and verification checks.

Freelance Data Specialist & Virtual Assistant (Remote) at Upwork

December 1, 2021 - Present

Completed 140+ projects with consistent 5-star ratings; managed long-term contract totaling 5,470+ hours and $60K+; Salesforce CRM data entry with 100% accuracy.