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