Njagi M.

Key Skills

Freelancer Overview

Antony Njagi Nairobi, Kenya | +254796091053 | [email protected] Professional Summary Detail-oriented and analytical AI Data Specialist and Technical Reviewer with experience in data labeling, prompt engineering, and quality assurance for AI training datasets. Expert at evaluates model outputs for factual accuracy, formatting, grammar, and alignment with safety criteria. Dedicated to optimizing dataset quality to train high-performing, safe, and context-aware machine learning models. Core Competencies ● Data Annotation & Labeling: RLHF, Supervised Fine-Tuning (SFT) data preparation, Named Entity Recognition (NER), text categorization. ● AI Quality Assurance: Model evaluation, factual verification, hallucination detection, bias screening. ● Technical Skills: Python basics, prompt engineering, database querying, data validation workflows. ● Language & Communication: Native fluency in English and Swahili, linguistic analysis, high attention to detail. Professional Experience Freelance AI Specialist & Data Trainer Independent Contractor | Nairobi, Kenya March 2025 – Present ● Annotate large-scale text datasets to improve conversational capabilities, grammar correctness, and structural layout of large language models (LLMs). ● Rank and score AI-generated responses based on safety guidelines, helpfulness, and logical reasoning accuracy. ● Draft, test, and refine complex adversarial prompts to evaluate model robustness and safety boundaries (Red Teaming). ● Consistently mainta