AI Benchmark Engineer | Native Language Specialist

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for an AI Benchmark Engineer | Native Language Specialist based in Brazil. This is a remote freelance opportunity for a native-speaking software or prompt engineer passionate about multilingual AI and rigorous model evaluation. You will design realistic Terminal-Bench tasks that test how effectively large language models handle software challenges in your native language. Your work will help uncover failure modes related to multilingual prompts, non-English datasets, Unicode, encoding, localization, and terminal workflows. You will build and validate high-signal benchmark environments while ensuring that language-specific assets remain authentic rather than relying on English translations. Working across task engineering, implementation, calibration, and quality assurance, you will directly contribute to improving the reliability and multilingual robustness of AI systems. This role offers flexible, project-based work within a global community of technical and language experts.