Skip to content
AirbnbAirbnbUnited States

Senior Staff Machine Learning Engineer, Post Training

Senior Staff ML Engineer fine-tunes and optimizes state-of-the-art LLMs for Airbnb's customer support AI products, including AI assistants and autonomous agents. Partners cross-functionally to productionize models at scale. Requires PhD and 10+ years experience with PyTorch.

248k – 310k/yr
Remote10+ YOEML Engineering

About the role

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 multi-year tech roadmap that enables our team to stay on the leading edge of the rapidly evolving AI landscape and leverage the best in class technologies to deliver customer benefits.
  • Continuously evaluate recent and 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.

Requirements

  • 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 experience with frameworks such as PyTorch.
  • Proven record of training, fine tuning, optimizing models and inference run-time.
  • 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.

Skills

PyTorchPythonLlm Fine-TuningLlm AlignmentReinforcement LearningModel OptimizationModel QuantizationGpu InferenceMultimodal ModelingLanguage Model Evaluation

Similar roles

ML Engineering jobs
Scale AI

Staff Software Engineer, Enterprise GenAI

Scale AISan Francisco, CA +1

Staff engineer owns large product areas in enterprise GenAI platform, working across backend, frontend, LLMs, and ML models. Solves scalability challenges with 7+ years experience in Python/JS, Kubernetes, and cloud providers.

248k – 311k/yr
On-site7+ YOEML Engineering
Axion

Staff Software Engineer, Agentic Platform

AxionSan Francisco, CA +1

Senior individual contributor architecting and scaling agentic LLM systems that turn messy manufacturing data into reliable root-cause insights. Owns orchestration, retrieval, evaluation, and guardrails for non-deterministic production systems.

250k – 270k/yr
Hybrid7+ YOEML Engineering
The Voleon Group

Member of Research Staff, Optimization

The Voleon GroupBerkeley, CA +1

Conduct optimization research and implement large-scale constrained optimization models that drive real-time trading decisions, working across the full research lifecycle from theory to production. Requires PhD-level coursework and strong applied research background in optimization.

250k – 275k/yr
Hybrid7+ YOEML Engineering
Nuance Labs

Member of Technical Staff — RL Research

Nuance LabsSeattle, WA

New/recent PhD to own RL and post-training for large-scale omni models. Build and scale the full RL/post-training stack including rollout, optimization, reward modeling, and evaluation for real-time audiovisual AI.

250k – 350k/yr
On-siteEntry levelML Engineering
Labelbox

Staff Software Engineer, AI Data Platform

LabelboxSan Francisco, CA

Staff-level engineer building AI data platform infrastructure, eval systems, and agent-first tooling for frontier labs. Requires 4+ years shipping production systems, full-stack experience, and deep TypeScript/Python proficiency.

250k – 280k/yr
Hybrid4+ YOEML Engineering