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# PCIe Senior/Lead Software Engineer

- **Company:** Arista Networks
- **Location:** Santa Clara, United States
- **Experience:** Expert
- **Salary:** $140,000.0 - $210,000.0
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), Automation of Tests, C++ (Programming Language), Software Debugging, Firmware, Field-Programmable Gate Array (FPGA), Python (Programming Language), PCI Express, Performance Tuning, Virtual Memory, State Machines, Hardware Infrastructure
- **Published:** September 8, 2026
- **Apply:** https://startup.jobs/pcie-senior-lead-software-engineer-arista-networks-9949027

## About the Role

* Strong engineering and Computer Science fundamentals.
 * 8+ years fluency in C or C++. Python experience an added bonus.
 * Solid understanding of PCIe hardware and software drivers
 * PCIe state machine, ltssm, tlp, credit flow control knowledge a plus
 * Experience with PCIe switches
 * Significant hands-on experience diagnosing problems, troubleshooting issues, and fixing bugs in low-level firmware

## Description

Operating right where hardware meets software, the Platform team builds the foundation for our networking ASICs and supporting infrastructure. PCIe software engineers write the code that manages high speed communication between hardware components in our switches. We work with hardware, diagnostics, and software engineers to maximize bandwidth and improve reliability on the PCIe links.

What You'll Do
As part of this team, you'll work on projects like:

 * Bringing up pcie links on new hardware designs
 * Tuning pcie parameters on root ports, bridges, and end points
 * Modifying the linux pci drivers and virtual memory allocation
 * Using AER and DPC to improve error visibility and resiliency
 * Developing userspace software that mediate between networking ASICs, FPGAs, and PCIe bridges.
 * Measuring hardware read and write performance
 * Develop automated tests using C, C++ and Python to validate your features.


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