Staff Network Engineer

About Nscale Nscale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI start-ups and large enterprise customers. Nscale enables AI-focused companies to achieve superior results by reducing the complexity of AI development. Our GPU cloud strengthens technical capabilities and directly supports strategic business outcomes, including cost management, rapid innovation, and environmental responsibility. At Nscale, our Engineering team plays a critical role in deploying and operating the infrastructure and software platforms that power our customers. We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As an Nscaler, you’ll build trust through openness and transparency, where everyone is inspired to do their best work. If you join our team, you’ll be contributing to building the technology that powers the future. About the Role The Network Engineering Team is responsible for the design, validation, and ongoing operation of all networking services that underpin both the internal management platform and the customer-facing cloud infrastructure — including high-performance Ethernet fabrics, InfiniBand, WAN connectivity, and data center networking. The team also acts as a 3rd/4th line escalation point for the support organization. As a Staff Network Engineer, you will be a technical authority for Nscale’s AI-optimized network fabrics. You will drive the technical direction across low-latency, high-bandwidth InfiniBand and Ethernet networks supporting large-scale training and inference workloads; own critical technical domains end to end; and raise the bar for architecture, automation, operational rigor, and engineering standards across the organization. You will combine deep hands-on engineering with broad architectural influence. You’ll define reference architectures, drive consistency across sites, lead complex technical decisions and escalations, and mentor engineers while partnering closely with deployment, data center operations, platform engineering, and vendors. What You'll Be Doing Define, design, validate, and evolve large-scale InfiniBand/RoCE and Ethernet fabric architectures at rack, row, and data center scale, with tight integration to bare-metal provisioning and cluster management systems. Own technical direction for high-performance Ethernet fabrics, including BGP, EVPN, VXLAN, LACP, and QoS, and establish reference architectures and standards implemented consistently across sites. Design and engineer perimeter and security infrastructure — firewalls, NAT, VPN, and security policy architecture — across WAN and data center edge environments. Lead network automation strategy in a GitOps model, building and guiding Python/Ansible tooling for provisioning, configuration validation, and compliance, with version-controlled configuration and…