Principal Software Engineer – Scale-Up Networking (GPU-Centric)

This role has been designed as ‘Hybrid’ with an expectation that you will work on average 2 days per week from an HPE office.

Who We Are:

Hewlett Packard Enterprise is the global edge-to-cloud company advancing the way people live and work. We help companies connect, protect, analyze, and act on their data and applications wherever they live, from edge to cloud, so they can turn insights into outcomes at the speed required to thrive in today’s complex world. Our culture thrives on finding new and better ways to accelerate what’s next. We know varied backgrounds are valued and succeed here. We have the flexibility to manage our work and personal needs. We make bold moves, together, and are a force for good. If you are looking to stretch and grow your career our culture will embrace you. Open up opportunities with HPE.

Job Description:

High Performance Computing, AI and Labs is a critical element of HPE. We are focused on delivering innovative solutions that accelerate our customers’ digital transformation, enabling them to tackle their complex, and data-intensive workloads. Combining deep expertise and the development of the world’s most cutting-edge, high-performance supercomputers, is defining the next era of computing delivering valuable insight & innovation. Join us and redefine what’s next for you.

What you'll do:

Key Responsibilities

Architect & Deliver Scale-Up Networking

• Design and implement GPU-aware networking paths for high-bandwidth, low-latency intra-node communication.

• Develop and optimize GPU → NIC → GPU data movement, shared memory models, and DMA pathways.

GPU Ecosystem Integration

• Work with NVIDIA CUDA, NVLink, NCCL, and AMD ROCm, Infinity Fabric, RCCL teams to integrate and optimize scale-up communication semantics.

• Drive improvements to DMA engines, BAR mappings, ATS/IOMMU, and GPU memory registration workflows.

Runtime & Communication Stack Development

• Enhance and extend Libfabric, UCX, CXI, SHMEMX, OpenMPI for GPU-accelerated scale-up workflows.

• Optimize communication collectives, transport layers, and GPU-direct capabilities.

Multi-NIC / NUMA Performance Optimization

• Characterize and tune multi-NIC per socket, NUMA-zone mapping, GPU locality, CQ/queue design, and CPU/GPU topology optimization.

Upstreaming & Architecture Influence

• Lead upstream contributions to open-source projects (OFI, UCX, OpenMPI, RCCL/NCCL enablement).

• Partner with HPC/AI ecosystem teams to shape future architectures.

Debugging, Performance, and Quality

• Own complex debugging across driver, runtime, GPU, kernel, and user-space boundaries.

• Develop profiling workflows using Nsight, ROCm tools, eBPF, perf, etc.

What you need to bring:

Required Skills & Experience

• 10–15+ years building high-performance networking, GPU, or kernel-level software.

• Deep expertise in C/C++, Linux internals, memory management, RDMA, PCIe, IOMMU, ATS, DMA engines.

• Strong understanding of CUDA, ROCm, GPU memory models, P2P, GDS (GPUDirect Storage), GDR (GPUDirect RDMA).

• Hands-on experience with MPI, SHMEM, Libfabric, UCX, or similar communication stacks.

• Proven experience driving architecture, cross-org technical decisions, and upstream contributions.

• Ability to mentor senior engineers, influence multi-team designs, and own end-to-end delivery.

Preferred Qualifications

• Experience with NIC architecture (CXI, RoCE, Infiniband, Slingshot, NVLink Switch).

• Experience optimizing collectives (All Reduce/All Gather) on GPUs.

• Background contributing to open-source HPC/AI libraries.

• Familiarity with HPC system architecture, NUMA tuning, and multi-accelerator systems.

Additional Skills:

Cloud Architectures, Cross Domain Knowledge, Design Thinking, Development Fundamentals, DevOps, Distributed Computing, Microservices Fluency, Full Stack Development, Security-First Mindset, Solutions Design, Testing & Automation, User Experience (UX)

What We Can Offer You:

Health & Wellbeing

We strive to provide our team members and their loved ones with a comprehensive suite of benefits that supports their physical, financial and emotional wellbeing.

Personal & Professional Development

We also invest in your career because the better you are, the better we all are. We have specific programs catered to helping you reach any career goals you have — whether you want to become a knowledge expert in your field or apply your skills to another division.

Unconditional Inclusion

We are unconditionally inclusive in the way we work and celebrate individual uniqueness. We know varied backgrounds are valued and succeed here. We have the flexibility to manage our work and personal needs. We make bold moves, together, and are a force for good.

Let's Stay Connected:

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Job:

Engineering

Job Level:

TCP_05

HPE is an Equal Employment Opportunity/ Veterans/Disabled/LGBT employer. We do not discriminate on the basis of race, gender, or any other protected category, and all decisions we make are made on the basis of qualifications, merit, and business need. Our goal is to be one global team that is representative of our customers, in an inclusive environment where we can continue to innovate and grow together. Please click here: Equal Employment Opportunity.

Hewlett Packard Enterprise is EEO Protected Veteran/ Individual with Disabilities.

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