Accelerator Software Engineer

Sohu is the first transformer-specific ASIC, and this role owns the accelerator software that makes it usable. You'll work across the layers that bring the chip to life and connect it to the host: the firmware that powers it on, the on-die software that initializes and manages it, and the kernel-level interface that exposes it to the rest of the inference stack. The work spans three tightly-coupled domains; ASIC firmware, microcontroller firmware, and host-side kernel and drivers. We hire engineers who are deep in one area and curious about the others.

This role spans across three work areas. You would specialize in one and contribute across the others as the team grows:

ASIC Software — Collaboration on ASIC architecture, on-device inference instruction execution, CPU initialization, bootloaders, IO drivers, thermal and power management, DMA data transfer, on-chip application software, and validation. The code that runs on the die itself on its various embedded CPUs.

Platform Software — microcontroller architecture and software for power sequencing, telemetry, and firmware update, and the foundational work that takes the chip from powered off to responsive. Involves close collaboration with the hardware team in the schematic and bring-up phases.

Host-side Kernel and Drivers — the host software that presents Sohu as a device the rest of the stack can program against. Linux kernel drivers, PCIe-visible memory management, high-throughput low-latency ring buffer command queues, and SRIOV VF device management.