Senior Network Engineer
About The Position
IREN is a leading AI Cloud Service Provider, delivering large-scale GPU clusters for AI training and inference. IREN’s vertically integrated platform is underpinned by its expansive portfolio of grid-connected land and data centers in renewable-rich regions across the U.S. and Canada. With 100% renewable energy, we build, own and operate our data centers and take pride in being at the forefront of sustainable solutions for the ever-evolving applications of high-performance compute. We believe that human progress is invaluable, but it should be done in the right way – responsibly, sustainably and having a positive impact on the communities we operate in. The Senior Network Engineer (Tier 3) responsible for designing, operating, and optimizing high-performance data center networks that power large-scale AI/ML and cloud infrastructure. Acts as the escalation point for complex network issues, driving deep technical troubleshooting, automation, and reliability improvements across multi-site, high-throughput environments.
Requirements
- Proven experience operating as a Tier 3 / escalation engineer handling complex, high-impact production issues.
- Deep expertise in: Layer 2/3 networking (VLANs, VXLAN, EVPN)
- Deep expertise in: Routing protocols (BGP, OSPF, IS-IS)
- Deep expertise in: Data center fabric design (Clos, ECMP)
- Strong hands-on experience with major networking vendors (e.g., Cisco, Juniper, Arista) and/or open networking platforms.
- Experience with network automation and infrastructure-as-code, including scripting in Python and using tools like Ansible or Terraform.
- Solid understanding of network performance tuning, including buffer management, queueing, QoS, and congestion control.
- Experience with network observability tools (SNMP, streaming telemetry, NetFlow/sFlow, syslog, packet capture/analysis).
- Experience with cloud and hybrid networking, including VPC design, peering, and connectivity to public cloud providers
- Bachelor’s degree in Computer Science, Network Engineering, Information Technology, or related field (or equivalent practical experience).
Nice To Haves
- RDMA / RoCEv2 (preferred)
- InfiniBand (nice to have)
- DPU/SmartNIC architectures (nice to have)
Responsibilities
- Act as a Tier 3 (L3) escalation point for complex network incidents, providing deep technical troubleshooting and root cause analysis beyond Tier 1/2 support.
- Partner with Network Operations (Tier 1/2) teams to resolve escalated issues, improve runbooks, and reduce recurring incidents through automation and systemic fixes.
- Lead resolution of critical, high-impact network incidents affecting AI/ML workloads, data center operations, and customer environments.
- Develop and refine operational procedures, playbooks, and escalation paths to enhance efficiency across Tier 1/2/3 support models.
- Identify opportunities to shift-left operational knowledge by mentoring junior engineers and improving observability and tooling.
- Maintain accurate network documentation, diagrams, and design standards, supporting compliance and audit requirements
- Optimize network performance for distributed training workloads, including tuning for large flows, incast, and burst traffic patterns.
- Support RDMA/RoCEv2 or InfiniBand environments(if applicable), including PFC, ECN, and lossless fabric tuning.
- Automate network provisioning, configuration management, and remediation using Python, Ansible, Terraform, or similar tools.
Benefits
- Total Compensation package may be inclusive of annual incentive bonus, equity (long-term incentive).
- Relocation or Living-out-allowance / per diem (as applicable and based on successful candidate circumstances)
- 100% company paid health insurance premiums(medical, dental, and vision)for employees, 75% company paid coverage for dependents
- Company-paid short-term and long-term disability insurance
- Voluntary life, critical illness, and accident coverage available
- Health Savings Accounts (HSA) – when combined with the High Deductible Health Plan
- Employee Assistance Program and wellness resources
- 401(k) retirement plan with company match
- Access to financial planning and legal services
- Paid Time Off (PTO) and paid holidays
- Internal skills training and advancement pathways
- Professional development to support certifications, continuing education, or role related training
- Company events and team-building activities
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Number of Employees
11-50 employees
