Mariana M.
Senior AI Trainer
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Mariana M. is a seasoned professional with over 11 years of experience as a Biomedical Scientist and a Master of Science in Health Sciences. Her expertise spans across biomedical research, AI model assessment, and scientific evaluation, with a distinguished focus on Biology, Healthcare, Medicine, and Molecular Biology. She has been instrumental in AI evaluation and training projects, notably in RLHF workflows, content validation, and quality assurance. Currently serving as an AI Trainer and LLM Evaluator at Outlier AI, she specializes in assessing the factual accuracy and reasoning quality of AI models. Her work involves comprehensive data annotation, comparative analysis, and providing structured human feedback to optimize Large Language Models. Mariana's prior experience includes roles at Welocalize and the Instituto Nacional de Medicina Laboratorial, where she honed her skills in evaluating AI-generated content and conducting scientific validations. As an academic researcher affiliated with the Federal University of Rio de Janeiro, her research has produced numerous peer-reviewed publications. Proficient in English and Portuguese, she holds a Master's degree in Health Sciences from Faculdade de Medicina do ABC.
Experience
AI Trainer | LLM Evaluator | Scientific Reviewer
Outlier AI · 2026 — PresentEvaluate and rank AI-generated responses according to project guidelines and established quality frameworks. Conduct RLHF-based evaluation tasks aimed at enhancing model effectiveness, instruction following, factual accuracy, and reasoning quality. Execute comparative analyses on various model outputs concerning relevance, completeness, safety, and correctness. Review and validate training datasets while adhering to annotation standards. Deliver structured human feedback to assist in the alignment and optimization of Large Language Models. Perform fact-checking and scientific validation for Biology, Healthcare, Medical, and STEM-related content. Audit annotation quality to ensure compliance with project guidelines.Scientific Content Specialist – Laboratory Medicine
Instituto Nacional de Medicina Laboratorial (INML) · 2024 — 2025Review scientific and medical content for technical accuracy and ensure evidence-based consistency. Implement scientific fact-checking, content validation, and quality review processes. Generate educational materials and technical documentation intended for healthcare professionals. Collaborate with subject matter experts to uphold scientific rigor and maintain quality standards.Academic Researcher
Federal University of Rio de Janeiro (UFRJ) & Faculdade de Medicina do ABC (FMABC) · 2014 — 2025Conduct biomedical research with a focus on endocrinology, metabolism, physiology, and molecular biology. Engage in experimental design, laboratory investigations, and analysis of biological data. Perform RT-qPCR, ELISA, molecular assays, and various statistical analyses. Assess scientific evidence and validate findings from research efforts. Contribute to peer-reviewed scientific publications and technical reports.AI Data Evaluator | Search Quality Rater
Welocalize · 2024 — PresentEvaluate content generated by AI and assess search engine results for their relevance, usefulness, credibility, and satisfaction of user intent. Utilize quality rating guidelines to evaluate the accuracy and reliability of content. Contribute to AI training initiatives through tasks related to annotation, validation, content review, and evaluation workflows. Conduct assessments of search quality and engage in data validation activities while analyzing information quality across scientific, medical, healthcare, and general-domain content.Clinical Laboratory Technician
Fundação do ABC · 2023 — 2023Carry out clinical laboratory analyses in compliance with quality assurance and regulatory standards. Assist in diagnostic workflows and overall laboratory operations. Perform sample processing, laboratory testing, and implement quality control procedures. Maintain technical documentation and ensure compliance with relevant records. Support healthcare professionals by assisting with diagnostic laboratory activities.
Skills & Expertise
Education
- Master of Science in Health SciencesFaculdade de Medicina do ABC (FMABC) · — — 2025
- Bachelor’s Degree in Biomedical SciencesFederal University of Rio de Janeiro (UFRJ) · — — 2022
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