Network Engineer (AI)

Location: London, England, United Kingdom. Workplace: On-site

Company

hirify.global is an energy startup building an integrated energy company across solar generation, batteries, grid infrastructure, real-time power trading, AI, hardware, and distributed energy systems.

What you will do

• Design, deploy, and operate lossless RDMA-capable fabrics for GPU compute and storage traffic, including RoCEv2, InfiniBand, QoS, congestion control, and buffer tuning.
• Build and manage leaf-spine data centre fabrics with routed underlays and BGP, EVPN, and VXLAN overlays.
• Implement tenant isolation across compute, storage, and management planes, and support tenant onboarding, segmentation, bandwidth guarantees, and capacity planning.
• Automate network provisioning, configuration, and validation using Python, Ansible, NetBox, and CI-based configuration management.
• Build telemetry and observability, troubleshoot performance from optics and cabling through switches and host NICs, and operate out-of-band recovery infrastructure.
• Own the office wired and wireless network, firewalls, VPN and remote access, office-to-data-centre connectivity, and networking documentation and knowledge sharing.

Requirements

• At least 5 years of experience operating production data centre networks.
• Strong experience with BGP, overlay and encapsulation design, EVPN/VXLAN, and leaf-spine or Clos fabrics.
• Practical experience with RDMA fabrics, including lossless Ethernet with PFC, ECN, and DCQCN, or InfiniBand.
• Experience with modern data centre network operating systems, Linux networking and administration, and network automation with Python, Ansible, source-of-truth systems, and version control.
• Experience with network telemetry and monitoring, including Prometheus/Grafana, sFlow/IPFIX, or streaming telemetry.
• Experience running corporate or campus networks, including wired and wireless switching, NAC/802.1X, VPN, remote access, and clear technical communication.

Nice to have

• GPU cluster networking with NVIDIA Spectrum-X, Quantum InfiniBand, ConnectX/BlueField, UFM, SHARP, or equivalent technologies.
• Container networking, collective-communication libraries, multi-tenant VRF isolation, enterprise firewalls, storage networking, bare-metal provisioning, or high-speed optical networking.
• Greenfield data centre network build experience or CCNP, CCIE, or equivalent certification.

Culture & Benefits

• Competitive salary with eligibility for equity.
• Biannual bonus scheme.
• Fully expensed technology matched to role requirements.
• Private health insurance.
• Breakfast and dinner allowance for office-based employees.