We are looking for a Senior Network & Interconnect Engineer. The successful candidate will design, deploy, and operate production-grade Infini Band and AI-optimized Ethernet fabrics, ensuring scalability, performance, and reliability for research institutions and enterprise customers across Italy and Europe. The role involves designing and operating Spine-Leaf datacenter fabrics (Infini Band and Ethernet with BGP/EVPN/VXLAN), leading technical escalations with NVIDIA Networking, and evaluating next-generation interconnect technologies such as DPUs, CXL fabrics, photonic networking, and Ultra Ethernet.

Design datacenter fabric and HPC interconnect end-to-end: topology selection (fat-tree, dragonfly, rail-optimized), oversubscription, bisection bandwidth targets, failure-domain design, and integration with storage backends (Ceph, VAST, WEKA, Bee GFS over IB / Ro CE). Bring up, tune, troubleshoot, and operate Infini Band XDR / NDR (Quantum-3 / Quantum-2) and Ethernet AI-optimized fabrics: subnet manager (Open SM) configuration, partitioning, Qo S, adaptive routing, congestion control, and performance counters. Design and operate Spine-Leaf datacenter fabrics with BGP / EVPN / VXLAN , multi-fabric and multi-site interconnect, across switch ecosystems including Mellanox SN, SONi C, Dell OS10 etc.

Own the physical layer of AI Factory and HPC cluster networking: optical cabling design (Bi Di, parallel optics, DAC, AOC), OOB management, patching matrix, and power and space planning in collaboration with the Operations and Facilities teams.

Instrument fabric observability: s Flow, IPFIX, streaming telemetry (g NMI), Prometheus exporters for switch fabric; Contribute to R&D; and presales initiatives: author the networking sections of Euro HPC JU and EU bids; participate in technology scouting on DPU (Blue Field-3+), CXL fabric, photonic interconnect, and Ultra Ethernet Consortium developments.

Write and maintain runbooks — step-by-step operational procedures with explicit go / no-go gates and rollback paths — for fabric bring-up, upgrade, and incident response workflows. Mentor junior and mid-level engineers in the team on advanced networking and fabric operations.

Education: Master's degree or Ph. D. in Telecommunications, Computer Networks, Computer Science, or a related STEM field — or equivalent practical experience, including: 4+ years of hands-on engineering experience in datacenter networking and high-speed interconnect. 2+ years of direct experience operating Infini Band fabrics in production (subnet management, troubleshooting, performance tuning). 2+ years of hands-on Spine-Leaf datacenter fabric design and operations at scale (BGP / EVPN).

SKILLS AND COMPETENCES Core Technical Skills: Infini Band: Mellanox HCA (Connect X-6 / 7 / 8, Blue Field), Quantum-2 / 3 switches, Open SM configuration and tuning, IB performance counters, IB-to-Ethernet gateway.

Ethernet AI fabric: Spectrum-X, Ro CEv2 with DCQCN / HPCC, PFC tuning, adaptive routing, congestion control. BGP (including EVPN), OSPF, MP-BGP, VXLAN, Geneve, MLAG, MC-LAG, RSTP, LLDP.

Linux networking: netlink, tc qdisc, e BPF for networking, XDP basics.

Automation & Infrastructure as Code: Python (production quality), Ansible with custom modules and Bash scripting. Go is a plus. Systematic troubleshooting methodology across hardware, firmware, driver, and OS layers. Ability to write design documents, RCA reports, and runbooks.

Communication: Fluent English (working language with Mellanox / NVIDIA / Dell engineering); clear written and verbal communication for vendor, customer, and internal audiences. Nice-to-Have Skills: Fabric management & orchestration platforms NVIDIA UFM (Enterprise / Telemetry / Cyber-AI) for Infini Band fabric management and anomaly detection. NVIDIA Net Q for Cumulus / SONi C fabric telemetry.

Dorado

Cruz (Cruz Fabric Controller / Operations Center) for multi-vendor SONi C fabric orchestration. Exposure to intent-based platforms such as Juniper Apstra, Cisco Nexus Dashboard, or Arista Cloud Vision. Ability to prioritize, organize, and deliver results in dynamic environments.

Collaborative approach with experience working across cross-functional teams. Proactive attitude, strong sense of ownership, and commitment to continuous improvement. Remote work — Flexibility to work from anywhere in Italy, with no hybrid mandate; on-site presence required only about once a month, with travel covered by the company.

Objective-based work — Clear, measurable objectives reviewed and updated throughout the year, with a structured growth path and access to cutting-edge interconnect technology in production. On-site missions — The role involves periodic on-site engagements at customer and partner facilities in Italy and across the EU (cluster bring-up, vendor Po C, co-deployment), with travel covered by the company.

RAL : 50.000,00 € Early Career Opportunities While this position targets experienced engineers, we are also building the next generation of networking specialists . If you have a solid technical foundation, strong curiosity, and a passion for high-performance networking, we encourage you to apply even if you do not yet meet every requirement. Junior engineers will have the opportunity to grow through mentorship.

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