Principal Software Engineer – CXI Drivers & Kernel Networking

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:

• Architect, develop, and maintain Linux kernel drivers for the CXI interconnect, including:

CXI Core Driver (shared hardware abstraction and resource management)

• CXI User Driver (user-space access, queue management, protection domains)

• CXI Ethernet Driver (IP, RXE, sockets integration)

• Lead 800G CXI driver development:

resource partitioning

• Interaction with IOMMU, PCIe, and virtualization stacks

• Own kernel interfaces used by:

Lustre/LNet (kCXI, kfabric provider)

• Verbs / RXE paths

• User-space libraries (libcxi, libfabric providers)

• Drive performance, scalability, and reliability improvements:

Low-latency paths, queueing models, retry/timeout handling

• Error reporting, recovery, and fault isolation

• Collaborate closely with ASIC, firmware, and validation teams to deliver Chip-to-Ship outcomes.

• Act as a technical leader:

Design reviews, code reviews, mentoring senior engineers

• Influence long-term driver architecture and roadmap

What you need to bring:

• 10+ years of systems software experience with deep expertise in Linux kernel development

• Strong experience with:

PCIe, DMA, interrupts, memory management

• Linux networking stack (netdev, IP, sockets, RDMA/RXE)

• Hands-on experience with Switch or NIC Software Stacks, especially in the low-level kernel and user space

• Proven ability to debug complex kernel + hardware interactions

• Excellent C programming and kernel debugging skills

Preferred Qualifications

• Experience with HPC or AI networking (RDMA, libfabric, MPI, storage fabrics)

• Familiarity with Lustre/LNet or high-performance storage stacks

• Experience working with custom NICs or ASIC-based interconnects

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.

HPE will comply with all applicable laws related to employer use of arrest and conviction records, including laws requiring employers to consider for employment qualified applicants with criminal histories.

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