Cornelius Kibet

[Cornelius Kibet Kiptoo] AI Training Specialist | Data Annotation Expert |Freelance Professional Summary Results-driven freelance AI training specialist with 4+ years of experience annotating, labeling, and curating high-quality datasets for machine learning models. Proven track record delivering 50+ projects for computer vision, NLP, audio transcription, and multimodal AI systems on platforms Appen, Remotasks,QA World Analyst and Upwork. Seeking long-term freelance or full-time opportunities in AI data preparation and model evaluation. Core Skills - Image & Video Annotation (bounding boxes, segmentation, keypoints, 3D cuboids) - Text Annotation (NER, sentiment, intent classification, summarization) - Audio Transcription & Labeling - LLM Response Evaluation - Quality Assurance & Data Validation - Tools: CVAT, Labelbox, Dataloop - Languages: English ,Kiswahili [Native], Spanish[Basic] Freelance Experience Freelance AI Training & Data Annotation Specialist Self-employed (via Upwork, Appen, Remotasks,QA WorldAnalyst) 2019 – Present - Completed 50+ AI training projects Image/Video projects: – Annotated 2,000+ images for autonomous driving (LiDAR + camera fusion) – Performed semantic segmentation – Labeled retail product detection NLP & LLM projects: – Rated and rewrote 5,000+ LLM responses for helpfulness, safety, and style – Built golden datasets for intent recognition and chatbot training – Performed fact-checking Audio projects: – Transcribed and diarized 40+ hours of multilingual speech – Labeled emotion, accent, and background noise for voice assistants Notable Clients & Platforms (non-NDA) - Appen – Multilingual speech and search relevance - Remotasks – LiDAR annotation and 3D point-cloud labeling - Various projects on Upwork Education Bachelor of Science in Computer Science [Strathmore University] Graduated: [2018] Relevant coursework: Machine Learning, Data Structures Additional Information - Availability: 30–40 hours/week - Rate: $18–45 USD/hour depending on task complexity - Portfolio available upon request (screenshots of dashboards, accuracy metrics, sample annotations – respecting NDAs) - References available from long-term clients