Thiago M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

AI Data Training Expert, Linguistic QA Specialist, and Portuguese Language Expert with native-level Brazilian Portuguese and advanced English proficiency. Experienced in AI/LLM evaluation, data annotation, conversational AI analysis, sentiment analysis, and sensitive information detection for large-scale machine learning systems. Skilled in evaluating AI outputs for factuality, helpfulness, fluency, clarity, naturalness, safety, hallucinations, and guideline compliance using binary pass/fail systems, graded-scale evaluations, golden sets, and structured QA methodologies. Hands-on experience with A/B Test Models, transcription validation, pronunciation analysis, multilingual datasets, NER anonymization, and AI safety-focused content review. Strong background in identifying grammatical errors, contextual inconsistencies, unnatural phrasing, and linguistic edge cases while providing structured feedback to improve AI model performance and data quality. Proficient in Jira, Datasaur, Slack, Figma, and SQL. Experienced in curriculum design and linguistic QA within AI and EdTech environments, with proven ability to work independently in asynchronous, detail-oriented workflows. 𝗔𝗰𝗮𝗱𝗲𝗺𝗶𝗰 𝗕𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱: • 𝗕𝗮𝗰𝗵𝗲𝗹𝗼𝗿’𝘀 𝗗𝗲𝗴𝗿𝗲𝗲: Business Administration • 𝗠𝗮𝘀𝘁𝗲𝗿’𝘀 𝗗𝗲𝗴𝗿𝗲𝗲𝘀: Environmental Management, Data Science, Project Management 𝗞𝗲𝘆 𝗖𝗼𝗺𝗽𝗲𝘁𝗲𝗻𝗰𝗶𝗲𝘀: Artificial intelligence | AI Training | NLP | LLM | Data Analysis | Content Design | Brazilian Portuguese | Linguistic