Samuel Nyambisa

Samuel Nyambisa Data Annotation Specialist | Nairobi, Kenya Professional Summary Detail-oriented Data Annotation Specialist with 7+ years of experience delivering high-quality labeled data for AI and machine learning systems. Proven track record of maintaining 98% accuracy across high-volume workflows, including annotation and content moderation. Highly reliable in remote environments with strong attention to detail and consistency. Core Skills Data Annotation & Labeling • Image, Text & Content Annotation • Quality Control & Validation • High-Volume Task Execution • Spreadsheet Tracking (Excel, Google Sheets) • Documentation & Reporting • Remote Collaboration Professional Experience Data Labeler – Sama, Nairobi (2017 – Present) • Annotated and reviewed large-scale datasets across image and text tasks, maintaining 98% accuracy • Ensured consistency by following strict annotation guidelines and resolving edge cases • Maintained detailed logs to support audits and workflow improvements • Met productivity targets in high-volume, time-sensitive environments Cloud Worker – CloudFactory, Nairobi (2021 – 2024) • Reviewed and moderated thousands of content items for policy compliance • Applied guidelines consistently to ensure high-quality datasets • Flagged ambiguous cases and improved guideline clarity • Delivered fast and accurate decisions in high-volume workflows Education & Certifications Certificate in Cyber Security – University of the People (2025 – Present) Team Lead Certification (2023) Certificate in Transcription – Ajira Digital Training (2021) Key Achievements • 50,000+ annotations completed with 98% accuracy • 10,000+ content items moderated with 100% compliance • Consistently met or exceeded productivity targets Languages English (Fluent) • Kiswahili (Fluent) Referees Available upon request