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I am Daniella Monteiro Cavalheiro, a Language & Learning Solutions Specialist with over 19 years of experience in language education, translation, and AI language model evaluation. Alongside my linguistic expertise, I bring strong skills in voice acting and professional audio recording, delivering clear, expressive, and authentic vocal performances for diverse projects. I specialize in multilingual language technologies, data annotation, and AI-driven learning solutions, with hands-on experience in voice recording, audio production, and voiceover work. My background in machine learning and prompt engineering supports my ability to adapt voice performances for personalized language learning and interactive AI applications. Passionate about using my voice to engage and communicate effectively, I thrive in collaborative, multicultural environments that value quality, innovation, and ethical AI practices. I am eager to leverage my combined skills in voice acting and language technology to contribute vibrant, precise, and impactful audio content.…I am Daniella Monteiro Cavalheiro, a Language & Learning Solutions Specialist with over 19 years of experience in language education, translation, and AI language model evaluation. Alongside my linguistic expertise, I bring strong skills in voice acting and professional audio recording, delivering clear, expressive, and authentic vocal performances for diverse projects. I specialize in multilingual language technologies, data annotation, and AI-driven learning solutions, with hands-on experience in voice recording, audio production, and voiceover work. My background in machine learning and prompt engineering supports my ability to adapt voice performances for personalized language learning and interactive AI applications. Passionate about using my voice to engage and communicate effectively, I thrive in collaborative, multicultural environments that value quality, innovation, and ethical AI practices. I am eager to leverage my combined skills in voice acting and language technology to contribute vibrant, precise, and impactful audio content.

Daniella Cavalheiro

AI Prompt Engineer, Data Annotator, Data Scientist, +4

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I am Daniella Monteiro Cavalheiro, a Language & Learning Solutions Specialist with over 19 years of experience in language education, translation, and AI language model evaluation. Alongside my linguistic expertise, I bring strong skills in voice acting and professional audio recording, delivering clear, expressive, and authentic vocal performances for diverse projects. I specialize in multilingual language technologies, data annotation, and AI-driven learning solutions, with hands-on experience in voice recording, audio production, and voiceover work. My background in machine learning and prompt engineering supports my ability to adapt voice performances for personalized language learning and interactive AI applications. Passionate about using my voice to engage and communicate effectively, I thrive in collaborative, multicultural environments that value quality, innovation, and ethical AI practices. I am eager to leverage my combined skills in voice acting and language technology to contribute vibrant, precise, and impactful audio content.…I am Daniella Monteiro Cavalheiro, a Language & Learning Solutions Specialist with over 19 years of experience in language education, translation, and AI language model evaluation. Alongside my linguistic expertise, I bring strong skills in voice acting and professional audio recording, delivering clear, expressive, and authentic vocal performances for diverse projects. I specialize in multilingual language technologies, data annotation, and AI-driven learning solutions, with hands-on experience in voice recording, audio production, and voiceover work. My background in machine learning and prompt engineering supports my ability to adapt voice performances for personalized language learning and interactive AI applications. Passionate about using my voice to engage and communicate effectively, I thrive in collaborative, multicultural environments that value quality, innovation, and ethical AI practices. I am eager to leverage my combined skills in voice acting and language technology to contribute vibrant, precise, and impactful audio content.

Available to hire

I am Daniella Monteiro Cavalheiro, a Language & Learning Solutions Specialist with over 19 years of experience in language education, translation, and AI language model evaluation. Alongside my linguistic expertise, I bring strong skills in voice acting and professional audio recording, delivering clear, expressive, and authentic vocal performances for diverse projects.
I specialize in multilingual language technologies, data annotation, and AI-driven learning solutions, with hands-on experience in voice recording, audio production, and voiceover work. My background in machine learning and prompt engineering supports my ability to adapt voice performances for personalized language learning and interactive AI applications.
Passionate about using my voice to engage and communicate effectively, I thrive in collaborative, multicultural environments that value quality, innovation, and ethical AI practices. I am eager to leverage my combined skills in voice acting and language technology to contribute vibrant, precise, and impactful audio content.

Skills

Prompt Engineering

AI Data Labelling

Python

Experience Level

Prompt Engineering

Expert

AI Data Labelling

Expert

Python

Intermediate

Language

Portuguese

Fluent

English

Fluent

Italian

Advanced

Spanish; Castilian

Advanced

Work Experience

Freelance Language Data Annotator & Prompt Rater

January 1, 2025 - Present

Annotate multilingual prompt-response pairs for LLM training, evaluating fluency, relevance, and safety. Collect Brazilian Portuguese voice data for ASR model training and apply strict annotation protocols to ensure high-quality, structured datasets. Collaborate with international teams to resolve discrepancies and support ethical AI development.

AI Trainer & Proofreader at Various International Projects

January 1, 2025 - Present

Record natural language samples and evaluate prompts to support AI model training and localization. Proofread Portuguese content for linguistic and cultural accuracy in AI applications. Partner with linguists and developers to optimize datasets and ensure reliable localization outcomes.

Educational Content & Learning Solutions Specialist at The Language Company (BR & PT)

June 1, 2009 - Present

Design and deliver AI-driven training programs tailored to diverse audiences. Develop psychometric assessments and interactive simulations, integrating generative AI. Lead multilingual projects using CAT tools and e-learning platforms to scale quality and accessibility.

Technology Teacher at António Correia de Oliveira School Group

June 1, 2009 - October 15, 2025

Teach digital skills, critical thinking, creativity, and AI literacy to primary students. Develop dynamic methodologies and digital resources for inclusive, engaging learning experiences.

Freelance Language Data Annotator & Prompt Rater at Freelance (Remote)

January 1, 2025 - Present

Annotate and evaluate multilingual prompt-response pairs for LLM training and assessment; collect and organize Brazilian Portuguese voice data for speech recognition model training; apply strict annotation protocols to ensure high-quality, structured data for machine learning projects; collaborate with international teams to resolve rating discrepancies and support ethical AI development.

AI Trainer & Proofreader at Various International Projects (Remote)

January 1, 2025 - Present

Record natural language samples and evaluate prompts for accuracy and safety; proofread and edit Portuguese content for AI applications; collaborate with linguists and AI developers to optimize training datasets and localization projects.

Educational Content & Learning Solutions Specialist at The Language Company (BR & PT)

June 1, 2009 - Present

Design and deliver training programs using AI-driven tools to personalize content; develop psychometric assessments and interactive simulations integrating generative AI; lead multilingual projects ensuring quality and scalability using CAT tools and e-learning platforms.

Technology Teacher at António Correia de Oliveira School Group

June 1, 2009 - October 15, 2025

Teach digital skills, critical thinking, creativity, and AI literacy to primary school students; develop dynamic methodologies and digital resources for inclusive and engaging learning experiences.