We are looking for a Senior Network & Interconnect Engineer.
The successful candidate will design, deploy, and operate production-grade InfiniBand 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 (InfiniBand 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.
Key Responsibilities: 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, BeeGFS over IB / RoCE).
Bring up, tune, troubleshoot, and operate InfiniBand XDR / NDR (Quantum-3 / Quantum-2) and Ethernet AI-optimized fabrics: subnet manager (OpenSM) configuration, partitioning, QoS, 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, SONiC, Dell OS10 etc.
Own the physical layer of AI Factory and HPC cluster networking: optical cabling design (BiDi, parallel optics, DAC, AOC), OOB management, patching matrix, and power and space planning in collaboration with the Operations and Facilities teams.
Instrument fabric observability: sFlow, IPFIX, streaming telemetry (gNMI), Prometheus exporters for switch fabric; correlate with the team's monitoring stack and drive capacity planning.
Contribute to R&D; and presales initiatives: author the networking sections of EuroHPC JU and EU bids; participate in technology scouting on DPU (BlueField-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 InfiniBand 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: InfiniBand: Mellanox HCA (ConnectX-6 / 7 / 8, BlueField), Quantum-2 / 3 switches, OpenSM configuration and tuning, IB performance counters, IB-to-Ethernet gateway.
Ethernet AI fabric: Spectrum-X, RoCEv2 with DCQCN / HPCC, PFC tuning, adaptive routing, congestion control.
Network protocols: BGP (including EVPN), OSPF, MP-BGP, VXLAN, Geneve, MLAG, MC-LAG, RSTP, LLDP.
Linux networking: netlink, tc qdisc, eBPF for networking, XDP basics.
Automation & Infrastructure as Code: Python (production quality), Ansible with custom modules and Bash scripting.
Go is a plus.
Problem-Solving & Documentation: 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 InfiniBand fabric management and anomaly detection.
NVIDIA NetQ for Cumulus / SONiC fabric telemetry.
Dorado Cruz (Cruz Fabric Controller / Operations Center) for multi-vendor SONiC fabric orchestration.
Exposure to intent-based platforms such as Juniper Apstra, Cisco Nexus Dashboard, or Arista CloudVision.
Soft Skills: Strong technical leadership and team coordination skills.
Excellent communication and stakeholder management abilities.
Mentoring mindset with a passion for developing team members.
Strong analytical, problem-solving, and decision-making skills.
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.
Adaptability and resilience in fast-paced, mission-critical environments.
Working environment: 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 PoC, co-deployment), with travel covered by the company.
RAL : ******,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.

📌 Senior Network & Interconnect Engineer (Rubiera)
🏢 Azienda Anonima
📍 Rubiera