Senior AI Data Center Network Engineer (InfiniBand)

Location: Needham, Massachusetts, United States

Company

hirify.global develops Bitcoin mining infrastructure, AI computational infrastructure, data centers, and cloud capabilities for artificial intelligence workloads.

What you will do

• Architect scalable, highly available data center networks using Spine-Leaf topology, DCN, DCI, VXLAN EVPN, and SDN.
• Design, deploy, and optimize GPU cluster networks based on InfiniBand and RoCEv2, including NVIDIA Spectrum and Quantum switches.
• Investigate complex AI networking issues involving RDMA packet loss, PFC, ECN, congestion, latency, and NCCL communication timeouts.
• Develop network automation and Infrastructure as Code using Python, Ansible, and Terraform.
• Monitor fabric health with NVIDIA UFM, NetQ, Zabbix, and Prometheus.
• Support Kubernetes, Docker, hybrid cloud networking, incident response, capacity expansions, firmware upgrades, and root-cause analysis.

Requirements

• Bachelor’s degree or higher in Computer Science, Network Engineering, Telecommunications, or a related field.
• 8–10 years of experience in large-scale data center network operations, architecture, and engineering.
• Expertise in TCP/IP, BGP, OSPF, ISIS, VXLAN EVPN, and Spine-Leaf data center technologies.
• Hands-on experience with InfiniBand, Subnet Manager, RoCEv2, PFC, ECN, and congestion control.
• Experience with Cisco Nexus, NVIDIA/Mellanox, or Juniper switches and routers, plus Linux administration.
• Professional fluency in English and Chinese is required.

Culture & Benefits

• Work with the AI Cloud team on infrastructure supporting AI training and inference workloads.
• Collaborate with global cross-functional teams.
• Operate large-scale AI infrastructure for customers across multiple markets.