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I am a detail-oriented Data Annotation & AI Training Specialist dedicated to helping teams build accurate machine learning models through high-quality ground-truth data. With experience across text, image, audio, and video datasets—including bounding box labeling, semantic segmentation, and text classification—I consistently deliver high-accuracy work while strictly adhering to complex project guidelines. Efficient and adaptable, I excel at identifying edge cases and maintaining dataset integrity using tools like Labelbox, CVAT, and SageMaker. I am committed to fast turnaround times and reliable communication to help keep your AI development pipeline moving forward seamlessly.…I am a detail-oriented Data Annotation & AI Training Specialist dedicated to helping teams build accurate machine learning models through high-quality ground-truth data. With experience across text, image, audio, and video datasets—including bounding box labeling, semantic segmentation, and text classification—I consistently deliver high-accuracy work while strictly adhering to complex project guidelines. Efficient and adaptable, I excel at identifying edge cases and maintaining dataset integrity using tools like Labelbox, CVAT, and SageMaker. I am committed to fast turnaround times and reliable communication to help keep your AI development pipeline moving forward seamlessly.

Tiago de Alexandria

AI Trainer, Data Scientist, Data Analyst, +2

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I am a detail-oriented Data Annotation & AI Training Specialist dedicated to helping teams build accurate machine learning models through high-quality ground-truth data. With experience across text, image, audio, and video datasets—including bounding box labeling, semantic segmentation, and text classification—I consistently deliver high-accuracy work while strictly adhering to complex project guidelines. Efficient and adaptable, I excel at identifying edge cases and maintaining dataset integrity using tools like Labelbox, CVAT, and SageMaker. I am committed to fast turnaround times and reliable communication to help keep your AI development pipeline moving forward seamlessly.…I am a detail-oriented Data Annotation & AI Training Specialist dedicated to helping teams build accurate machine learning models through high-quality ground-truth data. With experience across text, image, audio, and video datasets—including bounding box labeling, semantic segmentation, and text classification—I consistently deliver high-accuracy work while strictly adhering to complex project guidelines. Efficient and adaptable, I excel at identifying edge cases and maintaining dataset integrity using tools like Labelbox, CVAT, and SageMaker. I am committed to fast turnaround times and reliable communication to help keep your AI development pipeline moving forward seamlessly.

Available to hire

I am a detail-oriented Data Annotation & AI Training Specialist dedicated to helping teams build accurate machine learning models through high-quality ground-truth data. With experience across text, image, audio, and video datasets—including bounding box labeling, semantic segmentation, and text classification—I consistently deliver high-accuracy work while strictly adhering to complex project guidelines.
Efficient and adaptable, I excel at identifying edge cases and maintaining dataset integrity using tools like Labelbox, CVAT, and SageMaker. I am committed to fast turnaround times and reliable communication to help keep your AI development pipeline moving forward seamlessly.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Portuguese

Fluent

Work Experience

Data Analyst and Chatbot Developer at UniCUB (unit)

January 1, 2021 - January 1, 2024

Conducted data analysis and testing to support chatbot development. Focused on improving user experience through custom conversation flows, and supported KPI monitoring and performance reporting.

AI Data Trainer and Evaluator at Data Analytics (Google Analytics, Data Studio)

January 1, 2021 - January 1, 2026

Trained and evaluated Large Language Models (LLMs) using RLHF, focusing on accuracy, safety, and relevance. Created complex prompts and performed rigorous fact-checking using primary sources and logical reasoning. Structured and classified data, generating aligned AI responses to improve alignment with user intent. Conducted data analysis and extensive testing with an emphasis on transparency of government information. Implemented A/B testing and SEO optimization to increase traffic and conversions. Maintained technical documentation to ensure project traceability and quality. Developed custom chatbot conversation flows to improve end-user experience, including data analysis and monitoring of KPIs and performance reporting.