# Principal Machine Learning Engineer- LLM Fine-tuning and Optimization at Airbnb

You'll lead the development and optimization of large language models for Airbnb's customer support and product experiences. This role combines hands-on technical work—fine-tuning foundation models, building inference pipelines, and optimizing performance across batch and real-time applications—with strategic responsibilities like defining multi-year technology roadmaps and guiding architectural decisions for AI products. You'll collaborate with product, engineering, data science, and operations teams to deploy AI solutions that impact travel experiences globally.

This is an excellent fit for someone with deep machine learning expertise and a track record of bringing models from research to production at scale. You should have a PhD in a technical field plus 10+ years of hands-on experience, particularly with LLM post-training techniques (fine-tuning, alignment, reinforcement learning), model optimization (quantization, compression, inference efficiency), and Python/PyTorch proficiency. Experience in customer support AI systems and proven ability to navigate the full ML product development lifecycle are valuable.

Based in the United States, this is a full-time principal-level position. Publications at top-tier AI conferences and infrastructure deployment experience are highly regarded. The role sits within Airbnb's CS AI product team, which focuses on generative AI initiatives across trust, payments, customer service, and marketing functions.

Location: United States

Apply: https://getfoundi.com/apply/principal-machine-learning-engineer-llm-fine-tuning-and-opti-25ab6192

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