Senior Data Centre Network Engineer

Senior Data Centre Network Engineer 

Job Description 
We are seeking a Senior Data Centre Network Engineer to help architect, design, implement, and operate our data center networks, with a particular focus on high-performance networking for AI/GPU workloads. This role is based in Cork, acting as a key technical leader and escalation point for large-scale, mission-critical network services and regional buildouts, including hands-on engagement and travel to Saudi Arabia. 
The successful candidate will bring deep expertise in modern data center networking (leaf-spine fabrics, routing, segmentation, load balancing, automation) and strong operational rigor.
Travel: International travel required — including Saudi Arabia (willingness and no travel restrictions required)  
Key Responsibilities 
Data Centre Network Architecture & Engineering 

• Architect, design, and implement leaf-spine data center networks and related services to support large-scale compute, storage, and engineering environments 

• Own L2/L3 network design and operation across critical protocols/technologies such as BGP, STP, QoS, MLAG/vPC/CLAG, EVPN, VXLAN.  

• Drive network lifecycle management: scaling, upgrades, capacity planning, refreshes, and risk-managed change execution.  

Application Delivery / Load Balancing (where applicable) 

• Design and support application delivery / load balancing architectures including local and global (GSLB), with strong understanding of PKI/SSL, SSL offload, DNS impacts to application delivery. 

AI / GPU Networking (Preferred Focus Area) 

• Contribute to network designs that enable AI/ML training and inference at scale, emphasizing high bandwidth and low latency connectivity for GPU clusters.  

• Apply knowledge of AI/GPU networking concepts and technologies such as RDMA, RoCE, and high-speed Ethernet (e.g., 400G/800G roadmaps), and how network bottlenecks impact distributed training/inference performance.  

• Partner with infrastructure teams to validate and improve architectures supporting multi-node GPU workloads and scalable cluster growth.  

Automation, Observability & Operational Excellence 

• Improve reliability and operational efficiency through automation/orchestration and network-as-code practices (e.g., pipelines, configuration standards, and repeatable deployments).  

• Lead complex troubleshooting (individual, group, vendor-assisted) and deliver durable root-cause fixes, with strong TCP/IP operations expertise.  

Regional / International Support (Saudi Arabia Travel) 

• Provide on-site support when needed for deployments, cutovers, audits, and operational readiness activities in Saudi Arabia, collaborating with regional stakeholders and global teams.  

• Act as a senior escalation point across time zones; coordinate with vendors/partners as needed. 

 
Required Qualifications 

• Senior: 7+ years in large enterprise/data center networking 

• Fluency in English required 

• Demonstrated experience designing/implementing leaf-spine data center networks in heterogeneous environments.  

• Expert knowledge of core DC networking and protocols/technologies including EVPN, VxLAN, BGP, L2/L3 operations, and large-scale troubleshooting.  

• Experience with application delivery / load balancing architectures and their security/crypto implications (PKI/SSL, SSL offload, DNS).  

• Willingness and no restrictions to travel internationally, including Saudi Arabia  

Preferred skills 

• Fluency in Arabic 

• Kubernetes and container platforms 

• Linux operating systems 

• Server management (physical and/or virtualized environments)