ML Infra Engineer, Modeling

Physical Intelligence is bringing general-purpose AI into the physical world. We are a group of engineers, scientists, roboticists, and company builders developing foundation models and learning algorithms to power the robots of today and the physically-actuated devices of the future.

In this role you will help scale and optimize our training systems and core model code. You’ll own critical infrastructure for large-scale training, from managing GPU/TPU compute and job orchestration to building reusable and efficient JAX training pipelines. You’ll work closely with researchers and model engineers to translate ideas into experiments—and those experiments into production training runs.

This is a hands-on, high-leverage role at the intersection of ML, software engineering, and scalable infrastructure.

The ML Infrastructure team supports and accelerates PI’s core modeling efforts by building the systems that make large-scale training reliable, reproducible, and fast. The team works closely with research, data, and platform engineers to ensure models can scale from prototype to production-grade training runs.

• Strong software engineering fundamentals and experience building ML training infrastructure or internal platforms.

• Hands-on large-scale training experience in JAX (preferred), PyTorch.

• Familiarity with distributed training, multi-host setups, data loaders, and evaluation pipelines.

• Experience managing training workloads on cloud platforms (e.g., SLURM, Kubernetes, GCP TPU/GKE, AWS).

• Ability to debug and optimize performance bottlenecks across the training stack.

• Strong cross-functional communication and ownership mindset.

• Deep ML systems background (e.g., training compilers, runtime optimization, custom kernels).

• Experience operating close to hardware (GPU/TPU performance tuning).

• Background in robotics, multimodal models, or large-scale foundation models.

• Experience designing abstractions that balance researcher flexibility with system reliability.

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.