Lead HPC Network Architect for AI Cloud Infra

Lambda; Santo Niño 1st; On-site; PHP 11,314,000 - 16,342,000; Full time

Benefits offered by this job

Health, dental, and vision coverage

401k with 2% company match

Wellness and commuter stipends

Flexible PTO

Job summary

Lambda, The Superintelligence Cloud, is a leader in AI cloud infrastructure delivering scalable, low-latency networking for tens of thousands of customers. This senior role focuses on building high-performance data center networks for AI/ML workloads and large-scale cloud platforms.

You will architect InfiniBand and Ethernet fabrics, define topology, mentor teams, and drive standards across multi-site environments while collaborating with compute and storage teams.

Qualifications

• Proven experience (7+ years) architecting high-performance data center networks, preferably for HPC, AI/ML, or large-scale cloud infrastructure.
• Deep expertise with InfiniBand (HDR/NDR) and advanced Ethernet fabrics, including RoCE and RDMA protocols.
• Strong understanding of data center switching architectures, congestion control (PFC, ECN), QoS, and network virtualization technologies such as VXLAN and EVPN.
• Skilled in designing for low-latency and high-throughput data paths, including GPU-to-GPU and storage traffic optimization.
• Expertise with BGP-based fabric design, including eBGP underlays, MP-BGP EVPN, ECMP, route policy, and convergence.
• Experience with SDN, APIs, automation, and network telemetry.
• Strong optical networking competency, including transceiver technologies, fiber types and topologies, link budgets, breakout architectures, and WDM.
• Experience building resilient, fault-tolerant high-performance network architectures with redundancy, failover, and high availability.
• Excellent communication and leadership skills, capable of influencing technical decisions across diverse teams.
• Strong ownership and can do attitude, self-starter who feels comfortable working in ambiguity.

Responsibilities

• Architect high-performance networking solutions that power cloud platforms, with a focus on ultra-low-latency and high-bandwidth connectivity.
• Define the network topology and architectural patterns for large-scale GPU clusters, storage backends, and multi-tenant environments.
• Evaluate, benchmark, and select next-generation network technologies (e.g., InfiniBand NDR/XDR, RoCE, 400G-1.6T Ethernet, Ultra Ethernet, ESUN, OCI, etc) to meet AI workload requirements.
• Develop and maintain network architecture standards, reference designs, and scalability roadmaps for multi-site and hybrid environments.
• Partner with compute and storage architects to ensure seamless end-to-end data flow and fault tolerance.
• Guide network automation strategies and tooling to enable efficient provisioning, telemetry, and operational visibility.
• Mentor engineers and cross-functional teams on advanced network concepts, troubleshooting, and architectural best practices.

Skills

Leadership

Communication

Strategic planning

Ambiguity handling

Tools

InfiniBand HDR/NDR

RoCE

RDMA

VXLAN EVPN

BGP-based fabric

SDN & automation

Telemetry

WDM/optical tech

Job description

Lambda, The Superintelligence Cloud, is a leader in AI cloud infrastructure delivering scalable, low-latency networking for tens of thousands of customers. This senior role focuses on building high-performance data center networks for AI/ML workloads and large-scale cloud platforms.

You will architect InfiniBand and Ethernet fabrics, define topology, mentor teams, and drive standards across multi-site environments while collaborating with compute and storage teams.