Kennedy Maina Kinyua

AI Training & Data Operations Portfolio Kennedy Maina Kinyua ■ Prompt Evaluation (Before vs After) Before: 'Write about marketing' After: 'Write a 200-word beginner-friendly explanation of digital marketing with 3 examples.' Impact: Improved clarity, structure, and relevance of AI outputs. ■ LLM Response Ranking Example Prompt: Explain climate change to a 10-year-old. Ranked outputs based on simplicity, clarity, and factual correctness. Top-ranked response used simple language and relatable examples. ■ NLP Entity Recognition Example Text: 'John works at Safaricom in Nairobi.' PERSON: John | ORGANIZATION: Safaricom | LOCATION: Nairobi ■ Image Annotation Sample ■ NER Annotation Sample ■ Dataset QA Impact Maintained 100% annotation accuracy, reduced errors, and improved dataset readiness for model training.