Private Cloud HPC Network Engineer

Join a newly formed Private Cloud team building a greenfield on-premises private cloud platform based on OpenStack, with a strong focus on high-performance networking for HPC workloads. This role offers the opportunity to shape the network architecture, automation, security, and performance of a scalable and resilient cloud environment from the ground up. Responsibilities

• Design and evolve network architecture, standards, and patterns for large-scale private cloud and HPC environments
• Build scalable leaf-spine network designs using BGP, EVPN, VXLAN, and ECMP
• Develop networking solutions for compute, storage, and latency-sensitive workloads
• Evaluate and support technologies such as 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
• Lead performance analysis, network optimization, vendor evaluation, and technical benchmarking
• Support network security architecture, threat modeling, and complex cross-domain troubleshooting

• Strong experience supporting high-performance or large-scale compute environments using RoCE, RDMA, or InfiniBand
• Hands-on knowledge of Cisco NX-OS and/or Arista EOS
• Deep understanding of BGP, leaf-spine design, Layer 2 and Layer 3 networking, ECMP, EVPN, VXLAN, and resilience best practices
• Practical experience with OpenStack network services and API-driven network automation
• Strong troubleshooting, observability, and performance tuning skills in HPC networking environments
• Ability to work across compute, storage, networking, and application teams to resolve complex issues

Preferred Skills

• Linux and Kubernetes networking experience
• Exposure to SR-IOV and DPDK
• Hands-on experience with Python, Ansible, and Terraform
• Familiarity with SRE principles, including SLIs, SLOs, and error budgets
• Interest in newer technologies such as NVMe-over-Fabrics

Horizontal is committed to building an inclusive workplace where people from all backgrounds can contribute, grow, and succeed. We value diversity, equity, and inclusion as essential to how we work, collaborate, and innovate.