About The Role
We're seeking an experienced Network Engineer to design, build, and optimize the high-performance networking infrastructure powering our AI/ML operations in Toronto. You'll work at the cutting edge of network technology—managing InfiniBand and ultra-high-speed Ethernet fabrics that connect NVIDIA H100 and A100 GPUs, over 20PB of Ceph storage, and hundreds of servers.
You'll be hands-on with the full lifecycle of our network infrastructure: planning, building, testing, deploying, and keeping everything running at peak performance. That means troubleshooting issues as they arise, monitoring network performance and throughput, developing automation to streamline operations, and working closely with HPC and ML teams to ensure they have the bandwidth they need. You'll also help us plan for future capacity and evaluate emerging network technologies as we scale to meet increasingly demanding workloads.
Responsibilities
Configure and maintain InfiniBand and high-speed Ethernet fabricsOptimize network performance for RDMA, and GPU-to-GPU communicationManage network switches (Mellanox, NVIDIA, Micas Networks)Troubleshoot network bottlenecks and latency issuesPlan and execute network upgrades and expansionsNetwork security implementation (firewalls, VLANs, ACLs)Collaborate on storage network optimizationInfrastructure monitoring
Minimum Qualifications
4+ years of network engineering experience in production environmentsStrong understanding of L2/L3 networking protocols (TCP/IP, BGP, OSPF, VLANs)Hands-on experience with high-speed networking (100Gb+ Ethernet and InfiniBand)Hands-on experience with network security (firewalls, ACLs, network segmentation)Knowledge of HPC network topologiesExperience with InfiniBand fabrics including RDMA, RoCE, IPoIBStrong troubleshooting and problem-solving skills
Preferred Qualifications
Experience in data center environments or AI/ML infrastructureHands-on experience with high-performance Ethernet switches (e.g., Broadcom Tomahawk), and latest InfiniBand switches (e.g., Nvidia/Mellanox)Experience optimizing networks for GPU-to-GPU communicationExperience with open-source firewall solutions (OPNsense, pfSense, or similar)Experience with network automation toolsUnderstanding of distributed storage networking (Ceph cluster networks)Familiarity with network monitoring and observability tools (Prometheus, Grafana)Knowledge of multi-site network connectivity and WAN optimizationFamiliarity with cloud networking in at least one platform (AWS, GCP, or Azure) including VPC design, site-to-site VPN configuration, Direct Connect/ExpressRoute/Cloud Interconnect, hybrid cloud connectivity, and cloud-to-datacenter network integration
