Senior Staff Software Engineer, SDN Architecture at Crusoe · LumiJobs

Responsibilities

As a Senior Staff Software Engineer for SDN Architecture, you will be a driving technical force behind the software-defined networking stack that powers Crusoe's AI-first cloud. You will design and build high-performance networking solutions optimized for AI and HPC workloads, working deeply across the Linux kernel, packet processing pipelines, and network virtualization to help deliver the extreme throughput and low latency that massive GPU clusters demand.
What You'll Be Working On
SDN Execution & Roadmap Contribution: Contribute to and help refine the technical direction for Software-Defined Networking, translating strategy into concrete plans, milestones, and measurable outcomes for your area of ownership.
Architecture & Design: Participate in and help lead architecture reviews, author design documents for major SDN components, and provide thorough code reviews for critical services.
Kernel & Driver Optimization: Build and optimize Linux kernel modules and high-performance drivers using technologies such as XDP, eBPF, AF_XDP, and DPDK.
Fabric Design: Help design and implement network architectures for GPU-to-GPU fabrics, high-speed Ethernet, and specialized AI clusters.
Hardware Integration: Implement and tune virtualization features such as SR-IOV, vDPA, and virtio, and help integrate advanced SmartNICs, DPUs, or IPUs into the stack.
Performance Engineering: Troubleshoot complex production issues and perform deep performance tuning to maximize throughput and minimize latency and improve future designs based on learnings.
Technology Evaluation: Evaluate emerging SDN and NFV technologies, and contribute to open-source projects where strategically relevant, sharing findings with the broader engineering org.
Mentorship: Mentor engineers across the stack, review their designs and code, and help build a culture of engineering excellence.
Cross Functional: Partnering with software and operation teams to implement, execute, deploy and manage your architecture designs while incorporating feedback along the way.
What You'll Bring to the Team

Senior Staff Software Engineer, SDN Architecture

Responsibilities

Qualification

Preferred

Benefits

Company

Crusoe

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