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Networking Stack Developer

QFocus Technologies
Sunnyvale, CA $120k - $200k/yr Full time Posted 59m ago
Python Driver Development Engineer Engineering Ethernet Hardware Engineering Hardware Software Co Design Infiniband Kernel Development Linux Kernel Network Network Programming Programming Language Programming Languages Software Engineering Systems Tcp/ip
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Job Description

QFocus Technologies is seeking a Networking Stack Developer to contribute to the validation and refinement of L2/L3 protocol stacks for AI silicon powering AI training and inference server infrastructure. This onsite role in Sunnyvale, CA places you at the center of high-performance networking work, collaborating across teams to ensure robust, scalable stacks that integrate with NIC drivers and host systems for demanding AI workloads.

Responsibilities

  • Develop, validate and maintain high-speed L2/L3 protocol stacks over NIC drivers in Linux kernel, user mode, and other host/device operating systems.
  • Implement and optimize L2/L3 protocols, RDMA, and RoCE for high-performance networking applications.
  • Collaborate with cross-functional teams to develop and test NIC firmware and protocol stack software, troubleshoot and resolve NIC-related technical issues.
  • Develop and maintain test frameworks for NIC performance and functionality testing.

Requirements

  • Proficiency in C, C++, Python programming languages.
  • In-depth knowledge of networking protocols, including TCP/IP, IPv4, and IPv6, and their packet formats.
  • Hands-on experience with tools for capturing and analyzing protocol packet exchanges across high-speed interfaces.
  • Understanding of high-performance multi-core CPU/GPU clusters and their high-speed interconnect fabric interfaces such as PCIe and Infiniband.
  • Working familiarity with Host Channel Adapters (HCAs) or bridges that parse, translate and route data from standard NW stacks into fabric-specific transport logic would be an added advantage.

Education

Bachelor's or Master's degree in Computer Science or Electrical Engineering

Experience

Minimum of 6 years of professional experience

Technologies

  • C
  • C++
  • Python
  • TCP/IP
  • IPv4
  • IPv6
  • RDMA
  • RoCE
  • Linux kernel
  • NIC drivers
  • NIC firmware
  • PCIe
  • Infiniband
  • Host Channel Adapters (HCAs)

Benefits

  • Health insurance

About this opportunity – Network Stack Developer

Join a team serving an elite customer focused on cutting-edge AI training and inference server infrastructure silicon. As a Network Stack Developer, you will be responsible for developing L2/L3 protocol stacks to validate AI silicon under development.

Pay

$120,000 - $200,000 per year

Work Location

Sunnyvale, CA (onsite)

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