Job description Job Type: Full-time | Department: Network | Reporting to: Associate Director, Network | Work Location Type: #onsite #remote #hybrid
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.
Job requirements- 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.
Job responsibilities - Proven experienceoperatingas a Tier 3 / escalation engineer handling complex, high-impact production issues.
- Deepexpertisein:
- Layer 2/3 networking (VLANs, VXLAN, EVPN)
- Routing protocols (BGP, OSPF, IS-IS)
- 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).
- Familiarity with high-performance networking concepts:
- RDMA / RoCEv2 (preferred)
- InfiniBand (nice to have)
- DPU/SmartNICarchitectures (nice to have)
- Experience with cloud and hybrid networki ng, 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).
Job benefits At IREN, we offer a highly competitive compensation package that includes base salary, annual performance incentives, and opportunities to build long-term wealth through equity programs. These offerings are part of our broader total rewards package , thoughtfully designed to support your health, well-being, and long-term success.
Compensation
- Total Compensation package may be inclusive of annual incentive bonus, equity (long-term incentive).
- Relocation or Living-out-allowance / per diem (as appliable and based on successful candidate circumstances)
Health & Wellness
- 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
Retirement & Financial Wealth
- 401(k) retirement plan with company match
- Access to financial planning and legal services
Time Off & Leave Programs
- Paid Time Off (PTO) and paid holidays
Growth & Development
- Internal skills training and advancement pathways
- Professional development to support certifications, continuing education, or role related training
Community & Culture
- Company events and team-building activities
We value diverse perspectives and believe that skills can be developed. If you're passionate about this role, we want to hear from you - whether you meet every criteria or not. Your unique experiences might be exactly what we need!
