Key Skills

Freelancer Overview

AHMED OSAMA Cairo, Egypt | +20 155 111 7142 | ahmed00osama1423@gmail.com PROFESSIONAL SUMMARY Detail-oriented Computer Science graduate with hands-on experience in AI data annotation, RLHF evaluation, and prompt engineering. Proficient in multiple programming languages with a foundation in offensive security and penetration testing. Passionate about improving AI model quality through high-quality training data and systematic evaluation. Seeking to contribute to AI training and data quality teams. EXPERIENCE AI Data Annotator | Outlier AI | Remote Jan 2025 – Feb 2026 Performed data annotation and labeling across diverse datasets to train and fine-tune large language models. Evaluated AI-generated responses using RLHF methodology, providing preference rankings and quality assessments to improve model outputs. Crafted targeted prompts to test model capabilities, identify failure modes, and improve response accuracy. Maintained high annotation accuracy and consistency across thousands of tasks. AI Trainer | Mercor | Remote Sep 2025 – Dec 2025 Annotated and labeled training data for machine learning pipelines, ensuring quality and consistency standards. Wrote and refined prompts for AI model evaluation and capability testing. Collaborated with distributed teams to meet project deadlines and quality benchmarks. EDUCATION BSc in Computer Science — Faculty of Computers and Information Sciences Graduated 2025 Ain Shams University, Cairo, Egypt PROJECTS E-Commerce Platform with Ima

Labeling Experience

Education

Work History