Member of Technical Staff, Sandbox Infrastructure

SF Tensor is hiring a Member of Technical Staff to build and operate sandbox infrastructure for its GPU compiler, model training, and customer workloads. The role focuses on secure, high-fidelity GPU sandboxes across accelerator vendors, including virtualization, spot-capacity scheduling, multi-GPU and multi-node support, and live migration.

Responsibilities:

• You'll extend our sandboxing stack to new vendors and accelerators
• You'll build and maintain GPU virtualization below the runtime, including gVisor work at the driver and ioctl level
• You'll make sandboxes first-class citizens on spot capacity, which means preemption-aware scheduling, checkpointing and rescheduling
• You'll support multi-GPU and multi-node sandboxes, including the interconnect (NVLink, NVSwitch) and RDMA paths (InfiniBand, RoCE) paths those require
• You'll own live migration end-to-end, including our socket-preserving migration
• You'll guarantee measurement and profiling fidelity as well as their isolation
• You'll work directly with the compiler, post-training and kernel teams to ensure their throughput is not capped by sandboxes