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MatX

System Software Engineer - Linux Kernel and Device Drivers

Mountain View, CAmidAdded today

About this role

MatX is hiring a System Software Engineer to design and implement the Linux kernel driver stack for AI accelerator silicon, from pre-silicon validation through first-silicon bring-up. You'll own the full stack from PCIe device drivers through low-level userspace libraries, optimizing hardware/software interaction on a fast-moving team.

What you'll do

  • Architect and implement Linux kernel drivers for PCIe AI accelerators, handling memory management, DMA, interrupts, and command submission
  • Build low-level userspace libraries with ioctl/sysfs interfaces and direct chip access utilities
  • Validate chip features across pre-silicon platforms (simulation, emulation, FPGA) as first software to interact with new hardware
  • Debug hardware/software issues spanning RTL, firmware, kernel, and userspace during first-silicon bring-up
  • Profile and optimize the host I/O path including PCIe throughput, DMA efficiency, and interrupt latency
  • Write unit tests, regression tests, and prototype debug utilities; expose device telemetry to platform management

What they're looking for

  • Linux kernel device driver development (8+ years low-level systems experience)
  • C programming in both userspace and kernel contexts
  • PCIe device programming and hardware datasheet interpretation
  • Computer architecture fundamentals (MMIO, DMA, interrupts, IOMMU, virtual memory)
  • Hardware/software debugging with limited visibility
  • Pre-silicon validation (simulation, emulation, FPGA prototyping)
  • Kernel performance profiling tools (perf, ftrace, eBPF)
  • Systems design and ownership from specification to validation

Benefits

  • Equity compensation with flexible mix
  • Comprehensive health, dental, vision, and life insurance with company subsidies
  • Pre-tax HSA with generous company contribution
  • 4 weeks paid time off plus 12 company holidays
  • 3 weeks remote/flex work policy
  • Work on cutting-edge AI silicon at a well-funded startup
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MatX

MatX builds cutting-edge AI silicon and the system software stack to power it, focusing on optimizing hardware and software for large-scale machine learning workloads. The company is hiring system software engineers, kernel developers, compiler engineers, hardware simulators, and SOC integration engineers to design high-performance AI compute platforms.

View all jobs at MatX

Likely interview questions

  • Walk us through a PCIe device driver you've shipped—what was the most complex aspect of the DMA or interrupt handling?
  • How have you debugged a hardware/software integration issue where the root cause spanned multiple layers of the stack?
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