Arthur Santana

Arthur Santana, PhD

AI & NLP Specialist | LLM Evaluation & Quality | Conversational AI | Computational Linguistics

About

I am a computational linguist based in São Paulo, Brazil. I combine computational linguistics, NLP engineering, and systematic AI evaluation to develop more reliable language technologies.

I have a PhD in Linguistics from the University of São Paulo, with research focused on Brazilian Portuguese phonology. My professional background spans NLU, NLG, ASR, and TTS development, language data, and AI quality assurance.

Areas of Expertise

AI & NLP systems

NLU, NLG, ASR, and TTS development, grammar and semantic annotation, structured prompts, and LLM evaluation workflows.

AI quality & analysis

Rubric-based evaluation, error analysis, annotation guidelines, and quality assurance for language data and model outputs.

Speech & linguistics

Brazilian Portuguese phonology, vowel systems, speech technologies, and linguistic analysis.

Professional Experience

AI Quality Assurance Specialist

Structured evaluation of AI outputs, recurring error analysis, and QA documentation.

NLP Researcher

Applied research and prototyping of multi-LLM evaluation and synthesis pipelines, with a focus on factual grounding, hallucination detection, and output consistency.

Associate Linguist → Senior Linguist

NLU and NLG development, linguistic annotation, evaluation, and Brazilian Portuguese language resources.

Featured Projects

Research & Publications

PhD in Linguistics from the University of São Paulo, with research focused on Brazilian Portuguese phonology.

Selected publications · 2018

The status of unstressed lax-mid vowels in northern dialect of Brazilian Portuguese

Revista Linguíʃtica

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The role of phonological processes in defining the vowel inventory of Brazilian Portuguese

Acta Linguistica Academica

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Academic background Complete publications Conference presentations