Raphael D.

Key Skills

Software

Don't disclose

Top Subject Matter

AI data annotation support

data quality assurance

Analytics Domain Expertise

Top Data Types

Text

Top Task Types

Classification

Data Collection

Freelancer Overview

AI Data Annotation & Task Specialist. Brings 8+ years of professional experience across complex professional workflows, research, and quality-focused execution. Core strengths include N, A, and Google Sheets. Education includes Bachelor of Science, Kirinyaga University. AI-training focus includes data types such as Text and labeling workflows including Classification, Evaluation, and Rating.

Labeling Experience

Red Ventures - Data Analyst

Text

Cleaned, validated, and transformed datasets used for AI models and reporting pipelines. Analyzed structured and unstructured data to identify trends and actionable insights that improve workflow accuracy and efficiency. Collaborated with cross-functional teams to support data-driven deliverables and enhance AI-related data preparation. • Data cleaning, validation, and transformation for AI model inputs • Analysis of structured and unstructured datasets for insights • Improved workflows to increase accuracy and efficiency • Collaborated with cross-functional teams on data preparation and reporting

2022 - Present

AI Data Annotation & Task Specialist

TextClassification

Provided high-volume AI data labeling and annotation following detailed guidelines to support model training. Performed QA on AI-generated outputs to check for correctness and consistency with labeling standards. Managed multiple concurrent annotation projects under strict deadlines while maintaining quality throughout each batch. • Labeled annotated records for downstream AI training tasks • Conducted quality assurance on AI outputs • Followed detailed annotation guidelines and maintained consistency • Managed several projects with tight turnaround times

2021 - 2022

Education

Work History