We’re looking for Vietnamese language specialists who live and breathe phonology, orthography, syntax, semantics, pragmatics, historical linguistics, and sociolinguistics. You’ll challenge advanced language models on topics like tonal differentiation, classifier usage, compound formation, dialectal variation, idiomatic expressions, honorifics, and context-dependent meaning—documenting every failure mode so we can harden model reasoning. On a typical day, you will converse with the model on language scenarios, verify factual accuracy and logical soundness, capture reproducible error traces, and suggest improvements to our prompt engineering and evaluation metrics.