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leonardorlf

Leonardo Rosa

@leonardorlf

AI Evaluator, QA Tester and Portuguese Reviewer

Brazil
Portuguese, English
About me
I’m a Brazilian AI evaluator, QA tester and audio professional focused on accuracy, usability and quality. My experience includes reviewing AI-generated responses, comparing outputs, following guidelines, and identifying issues with relevance, clarity and naturalness. I also perform manual testing for websites and apps, documenting bugs and usability issues. As a native Brazilian Portuguese speaker, I review content for grammar, tone, fluency and cultural fit. I also work with audio production, editing, mixing and mastering, bringing a trained ear and technical attention to detail.... Read more

Skills

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leonardorlf
Leonardo Rosa
Offline • 

See my services

Data Labeling & Annotation
I will evaluate ai and llm responses in brazilian portuguese
From$35 / projectMore details
Software Testing
I will manually test your website or app and report bugs
From$25 / projectMore details

Work experience

Outlier

AI Training Contributor

Outlier • Freelance

Sep 2026 - Present • 2 mos

Evaluate AI-generated responses against detailed guidelines and quality criteria. Compare outputs, assess accuracy, relevance, clarity, naturalness and instruction adherence, and provide structured feedback to support AI training and improve response quality.

Self-Employed_/ Freelancer

QA Tester and Digital Product Reviewer

Self-Employed / Freelancer • Freelance

Jan 2025 - Present • 1 yr 10 mos

Perform manual testing for websites, apps and digital products, identifying functional issues, usability problems and inconsistencies. Document bugs clearly, reproduce issues and provide practical feedback focused on functionality, quality and user experience.

Self_employed / Freelance

Music Producer and Audio Engineer

Self employed / Freelance • Freelance

Jan 2018 - Present • 8 yrs 10 mos

Work across music and audio production, including arrangement, sound design, editing, mixing, mastering and critical listening. Experienced with Ableton Live and Logic Pro X, with a strong focus on sound quality, balance, detail and professional production standards.