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AI Specialist / Data Annotator
Demonstrated experience with Portuguese (Brazil).
Demonstrated experience with English.
Demonstrated experience with Data Annotation.
Demonstrated experience with RLHF Prompt/Content Evaluation.
Demonstrated experience with Content Safety Review.
AI Specialist / Data Annotator open to new opportunities
Project Aether: Executed multilingual data analysis, prompt evaluation, content quality assessment, transcriptions, and English-Portuguese translations for LLM training and alignment.
Project Dahlia & Project Lily: Performed high-accuracy audio transcriptions, quality checks, and text alignment for speech processing models.
Project Ogden (Feb 2026 – Jun 2026): Conducted safety and compliance evaluations for advertisement content on Facebook, ensuring adherence to policy standards.. Project Sirius (Mar 2026 – Jul 2026): Evaluated AI-generated music creation outputs, analyzing audio quality, style relevance, and prompt execution.
Project DR Pellet Feed 4.5 Serra Azul: Managed electromechanical assembly for an ore processing plant.. Planned pipe rack installation and filtration systems, and supervised assembly in the primary screening building.. Coordinated issue resolution and pre-commissioning documentation.
Project Flotation and Desliming Units: Supervised installation of sampling, online analyzer, and instrumentation peripherals.. Managed resource allocation and initial measurement reporting.
Project ITABIRITOS: Developed work plans for civil demolition and electromechanical disassembly.. Monitored production, managed scope control, and estimated out-of-scope costs.
Served as Product Manager for on-site R.D.C. reporting mobile software deployment.. Provided ERP support, updated corporate performance indicators, and managed project scope take-offs.
Managed schedules, daily progress tracking, and manpower allocation for major blast furnace revitalizations, structural recovery, and rolling mill furnace shutdowns.
Hi, I'm Leandro, a production engineer that also works as an AI data specialist and multilingual annotator. I'm proficient in English and native with Portuguese, and let's build a better and safer AI together, and also treat data with precision together.