Samuel Mwangi

Cross-disciplinary professional with 4 years of combined experience in AI data operations and medical laboratory science. Skilled in 2D/3D data annotation, prompt engineering, and AI response evaluation, with a strong foundation in clinical diagnostics. Adept at bridging domain expertise in healthcare with technical AI workflows to deliver high-quality training data and improve model performance, particularly in medical AI applications.

AI Data Annotator & Prompt Engineer at Freelance / Contract (Present)

Performed high-precision 2D and 3D image segmentation for computer vision training datasets and prompt engineering with focus on medical and clinical scenarios.

• Performed high-precision 2D and 3D image segmentation for computer vision training datasets, ensuring annotation accuracy above quality benchmarks
• Conducted search engine optimization (SEO) tasks to improve content discoverability and ranking performance for AI-driven platforms
• Designed and generated domain-specific prompts across multiple fields, with particular focus on medical and clinical scenarios
• Evaluated AI-generated responses using structured rubrics assessing helpfulness, relevance, verbosity (chattiness), and factual accuracy
• Leveraged deep medical knowledge to enhance prompt quality and response evaluation in health-related AI datasets

Medical Laboratory Science (Clinical Training & Coursework) at Kenya Methodist University

Comprehensive clinical training in medical laboratory diagnostics with hands-on experience across seven core laboratory disciplines.

• Completed comprehensive training in clinical diagnostics across seven core laboratory disciplines
• Performed blood sample collection (phlebotomy) and processing following standard operating procedures
• Conducted immunological assays, parasitological examinations, and hematological analyses
• Gained hands-on experience in microbiological cultures, biochemical assays, and virology testing protocols

Bachelor of Science in Medical Laboratory Science – Kenya Methodist University

Certificate in Prompt Engineering & AI Evaluation – Prompt-Rubric Academy