Senior Staff Machine Learning Engineer, Post Training

Airbnb is seeking a Senior Staff Machine Learning Engineer to join the CS AI product team, which focuses on Customer Support x Artificial Intelligence initiatives. The team develops and enhances AI models, ML services, and tools including LLM fine-tuning, alignment, optimization, RAG/Search, LLM evaluation, and testing automation. In this role, you will fine-tune state-of-the-art LLMs for diverse use cases, optimize models for high-performance deployment on Airbnb's ML infrastructure, and partner with product managers, software engineers, data scientists, and operations teams to develop AI products such as AI Assistant, Autonomous agent, recommendation, and travel planning.

• Work with large-scale structured and unstructured data to explore, experiment, build, and improve foundation models.
• Create a multi-year tech roadmap to stay on the leading edge of the AI landscape.
• Evaluate recent and upcoming large foundational models for selection and refinement.
• Prototype, develop, and productionize LLM models and pipelines at scale, including batch and real-time use cases.
• Drive key AI architectural decisions and contribute to Airbnb's ML platform architecture and strategy.

• PhD in Computer Science, Machine Learning, Mathematics, Statistics, or related technical field.
• 10+ years of experience developing machine learning models and products at scale.
• Programming experience in Python and hands-on experience with frameworks such as PyTorch.
• Proven record of training, fine-tuning, optimizing models, and inference runtime.
• Post-training experience in areas like data processing for fine-tuning, responsible LLMs, LLM alignment, reinforcement learning, efficient training and inference, language model evaluation, and/or multilingual and multimodal modeling.
• Or specialized experience in runtime optimizations, model quantization, compression, on-device inference, GPU inference, PyTorch, kernel development.

Base pay range: $248,000—$310,000 USD. This role may also be eligible for bonus, equity, benefits, and Employee Travel Credits.

Apply through the Airbnb careers page. For disability accommodations, contact reasonableaccommodations@airbnb.com.