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Job Summary: You will design and scale innovative and secure systems that solve real-world, high-impact problems at Mercado Libre, applying AI and continuous learning. Key Responsibilities: 1. Design and implementation of large-scale data curation pipelines for LLMs. 2. Scaling synthetic data generation using open-source and commercial models. 3. Collaboration with ML and research teams on training pipelines. As a **Data Engineer / Data Scientist** at Mercado Libre, you will design and scale innovative and secure systems that solve real-world, high-impact problems. You will work in a dynamic environment leveraging cutting-edge technology, applying sound engineering practices, proprietary AI models, and continuous learning—all to democratize e-commerce and financial services across Latin America. Imagine leading challenging, dynamic, and innovative projects—and being **responsible for**: * Identifying and extracting relevant training data from diverse internal and external sources. * Designing and implementing data curation pipelines for LLM training, ensuring quality and large-scale deduplication. * Scaling synthetic data generation using open\-source and commercial models. * Designing ablation experiments to measure the impact of data mixtures on model metrics. * Collaborating with ML and research teams to translate training requirements into concrete pipelines. **What are we looking for?** * Experience in data engineering using Python, SQL, BigQuery, and ETL pipelines. * Experience designing and executing experiments as a Data Scientist, including hypothesis and metric definition. * Knowledge of deep learning architectures, fine\-tuning, and AI model evaluation. * Familiarity with tools in the open\-source LLM ecosystem. * Knowledge of data infrastructure and development platforms. * This position is exclusively for people with disabilities. **Ready to make your mark on Latin American technology?** Apply now and join our purpose! *Hybrid work mode. Site: Bogotá, Colombia.*
