La Fosse
HPC Network Engineer
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Private Cloud HPC Network Engineer
Location: London – 2 days per week onsite
Contract: 6 months
Rate: £600–£700 per day
IR35: Inside IR35
The Opportunity
We are looking for a Private Cloud HPC Network Engineer to join a newly formed Private Cloud team, responsible for designing, deploying and operating a new greenfield on-premises private cloud based on OpenStack.
You will play a key role in designing, building and evolving the high-performance network architecture underpinning the platform, supporting demanding HPC workloads.
This is a hands-on technical role combining deep data-centre and HPC networking expertise with modern cloud networking, software-defined infrastructure and automation. You will work closely with compute, storage and platform engineering teams to deliver a scalable, resilient and highly automated cloud infrastructure.
Key Responsibilities
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- Design and evolve network architecture, standards and patterns for large-scale OpenStack Private Cloud and HPC environments.
- Develop scalable Leaf-Spine architectures using BGP, EVPN, VXLAN and ECMP.
- Design high-performance networking for compute, storage and latency-sensitive workloads.
- Evaluate technologies including RoCE, RDMA, SR-IOV, SmartNICs, DPUs and high-performance Ethernet.
- Integrate physical network infrastructure with OpenStack networking services including Neutron, OVN and ML2.
- Define network architecture for virtual machines, bare-metal workloads and Kubernetes platforms.
- Perform network performance analysis, optimisation, benchmarking and technical evaluation of networking technologies and vendors.
- Lead network security architecture and threat modelling.
- Troubleshoot complex cross-domain issues spanning networking, compute, storage and HPC applications.
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Required Skills & Experience
- Strong experience designing and supporting high-performance or large-scale compute environments using RoCE, RDMA or InfiniBand.
- Strong experience with Cisco NX-OS and/or Arista EOS.
- Deep understanding of BGP, Leaf-Spine architectures, Layer 2/Layer 3 networking, ECMP, EVPN, VXLAN and network resilience.
- Experience with technologies such as SmartNICs, DPUs and NVMe-over-Fabrics.
- Practical experience with OpenStack networking services and API-driven network automation.
- Strong HPC network observability, troubleshooting and performance tuning skills.
Nice to Have
- Strong Linux and Kubernetes networking knowledge.
- Exposure to SR-IOV and DPDK.
- Hands-on Python, Ansible and Terraform experience.
- Experience applying SRE principles, including SLI/SLO development and error budgets.
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