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Stephan Freitas

@stephanfreitas

AI Data Annotator focused on high-quality language model evaluation, prompt creation, and linguistic quality improvements.

Portugal

Message

What I'm looking for

I’m looking for an AI-focused role where I can evaluate chatbot responses, build and optimize prompts, and improve linguistic quality—working with clear guidelines and measurable quality expectations.

I’m an AI Data Annotator with freelance experience evaluating and classifying AI-generated responses. I create and optimize prompts, perform linguistic review, and drive quality improvements to strengthen consistency and reliability.

I bring strong attention to detail and analytical thinking to every annotation task. My focus is helping teams produce cleaner, more accurate datasets and better-performing conversational outputs through careful language and response evaluation.

Experience

Work history, roles, and key accomplishments

AI Data Annotator

Freelance

Evaluated and classified AI-generated chatbot responses, created and optimized prompts, and performed linguistic review to improve data quality and consistency.

Prompt Engineering Data Annotation Language Model Evaluation Linguistic Review Analytical Thinking Quality Improvement