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Principal Machine Learning Engineer- LLM Fine-tuning and Optimization

United States🌐 Remote💼 Full-time💰 $292,000–$292,000🗓 2026-05-24 → 2026-07-31

Core

Fine-tuning state-of-the-art LLMs and optimizing models for high-performance deployment on Airbnb's ML Infrastructure to power AI products like AI Assistants and autonomous agents.

Role type

Principal Machine Learning Engineer (LLM Fine-tuning & Optimization)

Builds

Production LLM models, pipelines, and AI products (AI Assistant, Autonomous agents, recommendation systems) for Customer Support and Travel Planning.

Domain

Travel / Generative AI / Large Language Models

Deliverable

production ML models

Required skills

LLM fine-tuning, model optimization, inference runtime optimization, data processing for fine-tuning, LLM alignment, reinforcement learning, model evaluation, multilingual/multimodal modeling, PyTorch, Python, kernel development, model quantization, GPU inference

Preferred skills

Peer-reviewed AI conference publications (NeurIPS, CVPR, ICML, ICLR, ICCV, ACL), Customer Support Systems AI experience, Agile AI production lifecycle experience, ML infrastructure architecture experience

Technologies

PyTorch, Python, LLMs, RAG, GPU

Responsibilities

Explore, experiment, and build foundation models for product and operational use cases; Create multi-year tech roadmaps for AI landscape leadership; Evaluate and refine large foundational models; Prototype, develop, and productionize LLM models and pipelines at scale; Drive key AI architectural decisions for products and ML platform strategy.

Seniority

Principal, hands-on IC with strategy & mentorship

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