> Markdown version of [/jobs/ext/2716590-principal-network-engineer](https://www.wearedevelopers.com/jobs/ext/2716590-principal-network-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Network Engineer - **Company:** NuScale Power Corporation - **Location:** Seattle, United States - **Experience:** Expert - **Salary:** $270,000.0 - $330,000.0 - **Contract:** Permanent contract - **Skills:** Link Aggregation (Ethernet), Artificial Intelligence, Border Gateway Protocol, Common Lisp Object Systems, Cloud Computing, Cyber Security, Continuous Integration, Data Centers, Network Address Translation, Ethernet, Github, InfiniBand, Subnetting, Virtual Private Networks (VPN), Python (Programming Language), Overlay Transport Virtualization, Remote Direct Memory Access, Ansible, Wide Area Networks, High Performance Computing, Juniper, Data Center Networking, Gitlab-ci, Git Flow, Low Latency, Terraform, Open Network Automation Platform - **Published:** September 4, 2026 - **Apply:** https://startup.jobs/principal-network-engineer-nscale-9439955 ## About the Role * 10+ years of network engineering experience, with significant depth in HPC, AI, hyperscale, or large-scale data center environments. * Extensive hands-on experience with RDMA-aware networking for AI/HPC workloads, including InfiniBand and/or RoCE, subnet managers such as OpenSM/UFM, and fabric orchestration. * Expert-level knowledge of modern data center routing and control planes, including BGP, EVPN-VXLAN, and Clos/spine-leaf architectures, with production experience on platforms such as Cumulus, Nokia, or Arista EOS. * Strong network automation expertise using Python and Ansible, Git-based workflows, and modern infrastructure-as-code and pipeline tooling such as Terraform, GitLab CI, or GitHub Actions; you treat the network as code rather than managing devices by hand. * Deep design and engineering experience with firewall platforms such as Juniper SRX and/or Palo Alto, including security policy architecture, high-availability design, and multi-tenant segmentation. * Experience designing network telemetry and observability for high-throughput, performance-sensitive environments. * Proven ability to lead complex technical decisions and incidents across networking, systems, storage, and HPC/AI workload teams, with the judgment to balance performance, reliability, operability, and delivery velocity. * Demonstrated experience defining architecture, standards, and technical strategy beyond a single project or site, and influencing engineering teams without relying on formal authority. * Strong communication and mentoring skills, with the ability to make complex technical trade-offs clear to engineering leaders, operators, and cross-functional partners. * Hands-on, adaptable, and comfortable operating with high ownership in a fast-paced environment building next-generation infrastructure for ML scale-out. ## Description 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 Principal Network Engineer, you will be a senior technical authority for Nscale's AI-optimized network fabrics. You will set 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., * 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 CI/CD-driven change across multi-vendor environments. * Drive operational excellence by leading complex escalations and root-cause analysis for performance and stability issues, and systematically reducing reactive toil through runbooks, automation, and measurable SLOs. * Set the direction for network observability, telemetry, monitoring, and alerting to provide clear visibility into fabric health, performance, and traffic patterns. * Ensure the accuracy and reliability of source-of-truth network inventory and configuration data, with changes flowing through structured engineering and change-management practices. * Partner with deployment, data center operations, platform engineering, systems, storage, and vendors on new site delivery and platform evolution. * Act as a technical mentor and force multiplier across the team through architecture reviews, design reviews, incident leadership, documentation, and knowledge sharing. * Identify systemic risks and architectural gaps across sites and drive durable solutions that improve scalability, reliability, and operational simplicity. ## Related Videos - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Dev & Test in the Cloud? 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