Principal Machine Learning Engineer- LLM Fine-tuning and Optimization
AI summary of the role
Principal ML Engineer leading LLM fine-tuning and optimization for Airbnb's CS AI product team.
No longer in the current catalog. Last included 2026-09-09. Check the employer’s posting for availability.
What you’ll do
- Fine-tune state-of-the-art LLMs for diverse use cases and optimize models for high-performance deployment on Airbnb's ML Infrastructure
- Work with large scale structured and unstructured data to build and continuously improve foundation models
- Create a multi-year tech roadmap to stay on the leading edge of the rapidly evolving AI landscape
- Continuously evaluate recent and upcoming large foundational models for enhanced performance and efficiency
What you’ll bring
- PhD in Computer Science, Machine Learning, Mathematics, Statistics, or related technical field
- 10+ years of experience developing machine learning models and products at scale from inception to business impact
- Programming experience in Python and hands-on experience with PyTorch
- Proven record of training, fine tuning, optimizing models and inference run-time
Technologies
LLM · fine-tuning · PyTorch · model quantization · GPU inference · reinforcement learning · RAG · multimodal modeling · kernel development
About Airbnb
Global two-sided marketplace connecting 5M+ hosts with travelers across 191+ countries for stays, plus newly launched in-destination Services and Experiences.
Public
Source and classification
Internal deployment & tooling · Evidence for this classification:
Marketing we rely on ML to ensure that guests and hosts have the best possible experience with Airbnb. The CS AI product team is responsible for driving CSxAI (Customer Support x Artificial Intelligence) initiatives by adopting the Generative AI technologies to enable an intelligent, scalable and exceptional service experience. The team develops and enhances various AI models, ML services and tools including LLM fine-tuning, alignment and optimization, RAG/Search, LLM evaluation and testing automation, feedback-based learning and guardrail for a wide range of applications in Airbnb. What you will do: As a principal machine learning engineer, you will be responsible for fine-tuning state-of-the-art LLMs for diverse use cases while optimizing models for high-performance deployment on Airbnb’s ML Infrastructure. You will partner with product managers, software engineers, data scientists
More from the job description
Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: Machine Learning and Artificial Intelligence are at the heart of the Airbnb product. From Trust to Payments, and from Customer Service to Marketing we rely on ML to ensure that guests and hosts have the best possible experience with Airbnb. The CS AI product team is responsible for driving CSxAI (Customer Support x Artificial Intelligence) initiatives by adopting the Generative AI technologies to enable an intelligent, scalable and exceptional service experience. The team develops and enhances various AI models, ML services and tools including LLM fine-tuning, alignment and optimization, RAG/Search, LLM evaluation and testing automatio [... source excerpt omitted ...] ngineer, you will be responsible for fine-tuning state-of-the-art LLMs for diverse use cases while optimizing models for high-performance deployment on Airbnb’s ML Infrastructure. You will partner with product managers, software engineers, data scientists and operation teams to brainstorm, design and develop AI products such as AI Assistant, Autonomous agent, recommendation, travel planning, and many more products that make meaningful impacts in the world of travel. Your responsibilities: Work with large scale structured and unstructured data; explore, experiment, build and continuously improve foundation models for Airbnb product, business and operational use cases. Create a [... source excerpt omitted ...] d upcoming large foundational models, ensuring the selection and refinement of the highest quality models for enhanced performance and efficiency. Hands-on prototype, develop and productionize LLM models and pipelines at scale, including both batch and real-time use cases. Drive key AI architectural decisions for products, and contribute to Airbnb’s ML platform architecture and strategy. Minimum Qualifications: PhD in Computer Science, Machine Learning, Mathematics, Statistics, or related technical field. 10+ years of experience with developing machine learning models and products at scale from inception to business impact. Programming experience in Python and hands-on experi
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