Gabriel Freitas Dentler

GABRIEL FREITAS DENTLER AI Data Specialist | LLM Evaluator-| +55 - | Manaus, Brazil (US Citizen) LinkedIn: linkedin.com/in/benediktfreitas | Behance: behance.net/diegesis AVAILABLE IMMEDIATELY | 10+ Years 100% Remote Experience PROFESSIONAL SUMMARY AI data expert with 10 years remote experience across Appen, Outlier, Alignerr. Specialize in LLM evaluation, RLHF/SFT workflows, prompt QA, and bias detection. Delivered high-volume human feedback improving model accuracy/safety for leading AI platforms. CORE COMPETENCIES • RLHF/SFT Evaluation • Prompt Quality Assessment • Output Validation • Bias & Safety Detection • NLP Annotation • Inter-Rater Reliability (95%+) • Data QA/Auditing • Content Policy Compliance PROFESSIONAL EXPERIENCE AI Data Specialist & LLM Evaluator | Appen Global | Remote | 2016–Present (8+ Years) • Evaluated/ranked 10,000+ LLM outputs for quality, relevance, accuracy across text/image/audio training datasets • Conducted RLHF/SFT evaluations delivering structured human feedback used in model fine-tuning cycles • Performed NLP annotation, transcription, and map/GPS validation for global AI products • Maintained 95%+ inter-rater reliability at high volume (200+ tasks/week) AI Trainer & Prompt Evaluator | Outlier AI | Remote | 2022–Present • Assessed 5,000+ prompt-response pairs for factual accuracy, instructionfollowing, safety across technical/creative domains • Identified failure patterns/edge cases; provided rubric-based feedback for iterative model improvements • Achieved consistent top-tier inter-rater scores in reasoning and multi- turn evaluation projects AI Evaluator (Alignment) | Alignerr | Remote | 2023–Present • Delivered human preference data for LLM alignment (helpfulness, harmlessness, honesty) • Specialized in advanced reasoning, instruction-following, and complex query evaluation AI Data Rater | Telus International | Remote |- • Rated/annotated search, social, and conversational AI content for global English markets • Ensured cultural relevance, policy compliance, and linguistic accuracy (500+ tasks/month) Content Specialist (SEO) | Particle Media (News Break) | Remote | 2020– Present • Produced SEO-optimized articles (finance, careers, entertainment) with keyword strategy and fact-checking EDUCATION & CERTIFICATIONS B.A. Digital Design (In Progress, Expected 2025) | Universidade Luterana do Brasil (ULBRA) • Relevant Coursework: Computational Modeling, Intro to Programming Certificates: • AI Research with NotebookLM (Codecademy, 2025) | Power BI Data Analysis (Alison, 2025) • SEO Principles (Semrush Academy, 2025) | Python Basics (Codio, 2024) | CSS Basics (W3C, 2024) TECHNICAL SKILLS AI/ML: RLHF, SFT, Prompt Engineering, Model Evaluation Tools: Davinci Resolve 20, Figma, NotebookLM, Python (Basics), SEO Tools (Semrush) Domains: NLP, Computer Vision, Speech, Maps/GPS, Content Moderation