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I'm a multilingual Linguistic Data Analyst and Content Localization Specialist with extensive experience in data annotation, transcription, and quality evaluation for AI and machine learning systems. I work fluently in Portuguese (native) and English, and I bring precision and consistency to linguistic QA tasks. I thrive collaborating with international teams, adapting linguistic content to diverse markets, and improving AI model accuracy through detailed linguistic feedback. I enjoy shaping data and content to help AI models understand people better.…I'm a multilingual Linguistic Data Analyst and Content Localization Specialist with extensive experience in data annotation, transcription, and quality evaluation for AI and machine learning systems. I work fluently in Portuguese (native) and English, and I bring precision and consistency to linguistic QA tasks. I thrive collaborating with international teams, adapting linguistic content to diverse markets, and improving AI model accuracy through detailed linguistic feedback. I enjoy shaping data and content to help AI models understand people better.

Juliano Westphal Valencia

Data Annotator, Data Analyst, Copywriter, +7

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I'm a multilingual Linguistic Data Analyst and Content Localization Specialist with extensive experience in data annotation, transcription, and quality evaluation for AI and machine learning systems. I work fluently in Portuguese (native) and English, and I bring precision and consistency to linguistic QA tasks. I thrive collaborating with international teams, adapting linguistic content to diverse markets, and improving AI model accuracy through detailed linguistic feedback. I enjoy shaping data and content to help AI models understand people better.…I'm a multilingual Linguistic Data Analyst and Content Localization Specialist with extensive experience in data annotation, transcription, and quality evaluation for AI and machine learning systems. I work fluently in Portuguese (native) and English, and I bring precision and consistency to linguistic QA tasks. I thrive collaborating with international teams, adapting linguistic content to diverse markets, and improving AI model accuracy through detailed linguistic feedback. I enjoy shaping data and content to help AI models understand people better.

Available to hire

I’m a multilingual Linguistic Data Analyst and Content Localization Specialist with extensive experience in data annotation, transcription, and quality evaluation for AI and machine learning systems. I work fluently in Portuguese (native) and English, and I bring precision and consistency to linguistic QA tasks.

I thrive collaborating with international teams, adapting linguistic content to diverse markets, and improving AI model accuracy through detailed linguistic feedback. I enjoy shaping data and content to help AI models understand people better.

Skills

Copywriting

Experience Level

Copywriting

Expert

Language

Portuguese

Fluent

English

Fluent

Spanish; Castilian

Intermediate

Work Experience

Website Manager at Gentoo Media

July 1, 2025 - November 9, 2025

Managed Portuguese-language content (PT-BR and PT-PT), ensuring linguistic accuracy and style consistency. Conducted site audits to identify linguistic and structural inconsistencies. Collaborated with tech and SEO teams to implement optimized content. Trained freelance writers and reviewed outputs for linguistic and factual precision. Ensured linguistic quality, accuracy, and brand compliance across sites.

Content Manager at North Star Network

June 1, 2024 - June 1, 2024

Managed Portuguese-language content (PT-BR and PT-PT), ensuring linguistic accuracy and style consistency. Edited, proofreading and localized text with focus on naturalness and clarity. Conducted keyword and content validation using tools like Google Search Console (GSC) and Ahrefs. Trained freelance writers and reviewed outputs for linguistic and factual precision. Collaborated with SEO and editorial teams to align localized content with global standards.

Language Data Analyst at Lionbridge / TELUS International

June 1, 2022 - June 1, 2022

Performed data annotation, labeling, and categorization tasks for AI training data sets; created and maintained ontologies to standardize linguistic behavior and model responses; conducted linguistic QA and consistency testing for speech recognition and LLM outputs; collaborated with cross-functional engineering and ML teams to refine model predictions; evaluated machine translation output quality and provided linguistic feedback for improvement; worked with LLMs to fine-tune content to tone, style, and accuracy for virtual assistants; authored documentation and style guidelines to enhance annotation and review processes.

Language Data Analyst – AI & Linguistic Projects at Lionbridge / TELUS International

June 1, 2022 - June 1, 2022

Performed data annotation, labeling, and categorization tasks for AI training datasets. Created and maintained ontologies to standardize linguistic behavior and model responses. Conducted linguistic QA and consistency testing for speech recognition and LLM outputs. Collaborated with cross-functional engineering and ML teams to refine model predictions. Evaluated MT outputs for quality and provided linguistic feedback for improvement. Worked with LLMs to fine-tune content to tone, style, and accuracy for virtual assistants. Authored documentation and style guidelines to enhance annotation and review processes.

Customer Support Specialist at Voxpro / TELUS International

March 1, 2019 - March 1, 2019

Delivered bilingual support (EN/PT) to users and documented linguistic insights for system improvement. Translated and adapted technical documentation to improve user clarity and experience.