Network Security Engineer

Requirements

Must have:

• We need at least 5 years of network operations experience, ideally including data center or GPU cluster networking.
• We require strong hands-on knowledge of BGP, OSPF, VLAN, ACL, VPN, firewalls, and spine-leaf network design.
• We expect practical experience with Cisco, Arista, Juniper, or NVIDIA/Mellanox networking equipment.
• Prior exposure to InfiniBand, RoCE, or RDMA is preferred.
• We look for a basic understanding of IAM, MFA, SIEM, EDR, and core security compliance practices.
• We need working knowledge of Linux, shell or Python scripting, or Ansible.
• English communication skills are required for daily interaction with US datacenter teams and vendors.
• You must have valid legal authorization to work in the United States.
• Chinese language proficiency is required.

Responsibilities:

• We coordinate on-site operations at US data centers and work closely with colocation facilities, telecom carriers, hardware vendors, and our Shenzhen technical team.
• We deploy, monitor, and troubleshoot service networks, management networks, and high-speed InfiniBand/RoCE networks.
• We maintain network device configurations, including switches, routers, firewalls, VPN, BGP, VLAN, ACL, and related components.
• We manage access controls, account permissions, MFA, vulnerability remediation, security logs, and basic security incidents.
• We oversee network topology, configuration backups, asset inventories, change logs, and operations and maintenance SOPs.
• We monitor network and datacenter SLAs, lead major incident response, conduct RCA reviews, and drive corrective actions.
• We participate in an on-call rotation for urgent outages and perform on-site troubleshooting in datacenters when needed.

Company:

We offer an in-person role supporting US data center operations, with a salary range of $120,000 to $180,000 per year. This position involves close collaboration with our technical team in Shenzhen and external partners across colocation, telecom, and hardware environments. We are looking for a Chinese-speaking network operations professional who can support critical infrastructure and respond to incidents in a fast-paced datacenter setting.