Key Skills

Freelancer Overview

JAMES KERERI Data Annotation Specialist Nairobi, Kenya • jameskereri@email.com • +254 700 000 000 linkedin.com/in/jameskereri • Available for Remote & On-site Work PROFESSIONAL SUMMARY Detail-oriented and highly accurate Data Annotation Specialist with extensive experience in labeling, classifying, and validating datasets for machine learning and AI applications. Proven ability to annotate diverse data types—text, image, audio, and video—while maintaining precision rates above 98%. Adept at working within annotation platforms, interpreting complex guidelines, and supporting model training pipelines. Committed to delivering high-quality annotated data that drives AI performance improvements. CORE COMPETENCIES PROFESSIONAL EXPERIENCE Senior Data Annotation Specialist | Samasource (Sama) Nairobi, Kenya • March 2022 – Present Lead a team of 8 annotators on a large-scale NLP project, labeling over 500,000 text samples monthly for a major AI research firm. Perform semantic segmentation and object detection annotation on image datasets for autonomous vehicle training, achieving 99.1% inter-annotator agreement. Develop and refine annotation guidelines and quality rubrics, reducing rework rate by 35% across the team. Conduct daily QA audits on 15% random sample of peer-annotated data, flagging inconsistencies and providing structured feedback. Collaborate with ML engineers and project managers to clarify labeling schemas and resolve edge cases. Annotate multilingual content

Labeling Experience

Education

Work History