Sr. Network Engineer

Cirrascale Cloud Services • San Diego, CA

42d • $125,000 - $180,000

About The Position

We are seeking a Sr. Network Engineer to join our Engineering team. This individual contributor role operates with high autonomy, owning network projects from conception through delivery. The role owns the design, operation, and optimization of Cirrascale's SD-WAN, multi-homed internet edge, and cloud interconnect infrastructure, ensuring SLA-backed connectivity across data centers, cloud, and customer environments. You will work with the VP of Engineering to align network initiatives with infrastructure and platform strategy. You will partner cross-functionally to deliver secure, scalable, and high-performance network systems, including the InfiniBand fabrics that support our AI and HPC workloads.

Requirements

• Designed, operated, and scaled resilient multi-homed internet edge architectures supporting >10Gbps sustained throughput, including routing policy design, peering strategy (IXPs), inbound/outbound traffic engineering, validated failover procedures to meet SLA-backed uptime targets, and advanced eBGP policy implementation (route filtering, community manipulation, local-pref/MED tuning, AS-path prepending).
• Built high-availability edge designs utilizing redundant firewalls (active/passive or active/active), state synchronization, load balancing, and fast failure detection mechanisms (e.g., BFD).
• Experience implementing DDoS mitigation strategies, RTBH, or integration with scrubbing providers is strongly preferred.
• Experience designing and operating hybrid cloud interconnects and customer connectivity solutions including private interconnects, cross-connects, and IPsec/GRE tunnels.
• 7+ years of experience in network engineering or related infrastructure roles.
• Strong knowledge of TCP/IP, BGP, OSPF, ECMP, VLANs, and other Layer 2/3 technologies.
• Hands-on experience with enterprise switches, routers, and firewalls (e.g., Cisco, Arista, SONiC, Fortinet).
• Experience with network monitoring tools (e.g., Nagios, Zabbix, Prometheus/Grafana, etc.).
• Demonstrated experience automating network configuration, validation, and change management using Ansible, Python, or similar tools in production environments.
• Understanding of cloud and virtualization concepts (OpenStack, VMware, k8s, etc.).
• Strong documentation and communication skills.
• Ability to participate in an on-call rotation and occasional after-hours support.

Nice To Haves

• Demonstrated technical leadership as a senior engineer, including setting technical standards and driving network design projects end-to-end.
• Certifications such as CCNA, CCNP, or equivalent experience.
• Exposure to HPC, data center networking, SD-WAN and InfiniBand.
• Experience in a fast-paced startup or cloud service provider environment.

Responsibilities

• Own and operate the company’s internet edge architecture, including ASN management, upstream provider relationships, peering strategy, and global routing policy.
• Design, configure, and maintain SD-WAN, LAN, WAN, VPN, firewall, and switching/routing environments.
• Deploy and support InfiniBand fabrics for GPU cluster infrastructure.
• Implement network telemetry and BGP monitoring systems to proactively detect routing anomalies, traffic shifts, and DDoS conditions.
• Monitor network performance and troubleshoot issues to ensure reliability and uptime.
• Lead incident response for network edge events and author postmortems with actionable remediation plans.
• Support the buildout of new infrastructure within our GPU cloud platform.
• Collaborate with Engineering and Platform teams to align networking with infrastructure needs.
• Manage network documentation including topologies, IP allocations, and configurations.
• Evaluate and recommend new tools, technologies, and network optimizations.
• Assist in data center migrations and bringups, hardware upgrades, and capacity planning.
• Maintain compliance with internal and external security and performance standards.

Benefits

• Comprehensive benefits package, including health, dental, and vision insurance, retirement plans, paid time off, and opportunities for professional development.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed