Dennis M.

Key Skills

Software

No software listed

Top Subject Matter

My strongest domains are Information Technology (ICT)

E-Commerce & Business Operations

Multimodal Content Evaluation (Visual Design & Multilingual Communication). * ICT & System Logic: Backed by formal ICT training

Top Data Types

Image

Video

Text

Top Task Types

RLHF

Audio Recording

Data Collection

Transcription

Translation/Localization

Text Summarization

Freelancer Overview

DENNIS MWANGI AI Trainer & Data Annotator | RLHF Specialist | Multilingual Evaluator [email protected] | Nairobi, Kenya | Available for Remote Work Worldwide PROFESSIONAL SUMMARY Highly motivated AI Trainer and Data Annotation Specialist with 3+ years of remote work experience, skilled in evaluating AI-generated content, writing high-quality prompts, and delivering precise human feedback that improves large language models (LLMs). Proficient in RLHF (Reinforcement Learning from Human Feedback), content quality rating, and multilingual annotation in both English and Swahili. Backed by certifications from the Ajira Digital Program (Government of Kenya) and Nairobits Trust, and supported by hands-on experience managing complex workflows, client communications, and digital operations — skills that translate directly into fast onboarding, independent task execution, and consistent output quality on AI training platforms. KEY ACHIEVEMENTS • 60% Engagement Growth: Increased social media engagement across multiple client accounts through data- driven content strategies. • 45% Cost Savings: Reduced vendor and operational costs through structured contract management and organised workflows. • 52% CTR Increase: Boosted click-through rates on promotional content through high-quality content creation and attention to detail. • 82% Client Satisfaction: Maintained consistent satisfaction rating across 5 concurrent client accounts through accuracy and reliability. • 6 Hours Saved per

Labeling Experience

Education

Work History