Looking for a job

Mariangela Ribeiro

@mariangelaribeiro

AI Data Annotation & LLM Quality Specialist evaluating model outputs, ranking preferences, and reviewing Brazilian Portuguese content.

Brazil

Message

What I'm looking for

I'm looking for full-time contractor assignments in AI evaluation and data annotation, with opportunities for international collaboration.

As a Freelance AI Evaluator / Data Annotation & QA Contributor, I evaluate AI-generated and human-produced outputs against project-specific rubrics for accuracy, relevance, safety, consistency, and task fulfillment. I compare and rank responses, document evidence-based rationales, and support QA/IQA by identifying errors and recurring quality trends.

At Carranza Cursos, I coordinated digital projects and content production, reviewed copy and customer communications, and used spreadsheets and performance indicators to monitor results. My evaluation work also covers Brazilian Portuguese transcription and translation, audio/TTS, search relevance, and multimodal content.

Experience

Work history, roles, and key accomplishments

Current

Freelance AI Evaluator / Data Annotation & QA Contributor

Current

Freelance

Jan 2026 - Present (8 months)

Evaluates AI-generated and human-produced outputs against project-specific rubrics for accuracy, relevance, safety, consistency, linguistic quality, and task fulfillment. Performs preference-ranking, classification, search relevance, and QA/IQA tasks while documenting quality trends and maintaining consistent judgments.

LLM Evaluation Data Annotation Preference Ranking Classification Search Relevance Content Safety IQA Rubric based Evaluation Guideline Compliance Error Analysis Edge Case Documentation Quality Trend Analysis Portuguese Language QA Multimodal Evaluation ASR Transcription Translation Text to Speech (TTS)Caption Quality Evaluation

Marketing, Project Operations & Customer Experience

Carranza Cursos

Nov 2019 - Nov 2025 (6 years)

Coordinated digital projects, schedules, content production, and cross-functional execution while managing multiple concurrent deliverables with strict quality and deadline requirements. Created and reviewed professional copy, scripts, and customer communications, and managed customer experience and retention workflows.