Senior Research Engineer, Olmo + Molmo

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Ai2 is hiring a Senior Research Engineer to train flagship open-source models (OLMo, Molmo). You will own end-to-end delivery of large-scale multimodal and agentic AI systems while collaborating with world-class researchers. This role combines deep software engineering with cutting-edge ML research in a non-profit AI institute.

• Build and optimize infrastructure for LLM, multimodal, and agentic research, including training/inference pipelines, dataset curation, and large-scale preprocessing.
• Design, train, and evaluate multimodal models (vision + language) and agentic workflows.
• Scope and lead research projects, prioritizing experiments for highest impact.
• Bridge cutting-edge research to production-quality products and contribute to open-source community.

• 4+ years of ML infrastructure experience (data preprocessing, model training, evaluation, inference, deployment).
• Experience with end-to-end model development (dataset construction, training, fine-tuning, evaluation, profiling, monitoring).
• Familiarity with modern model architectures (LLMs, vision-language models, agentic systems).
• Proficiency in Python and a major ML framework (PyTorch, JAX, or TensorFlow).