Infrastructure Engineer (OpenStack Neutron Specialist) at Nscaleoperationsukltd

. 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 bolsters 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 driving the deployment and then subsequent management of our infrastructure and software platforms.. 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 (Job Purpose) The Infrastructure Engineer (Neutron Specialist) sits within the Infrastructure Engineering team. The Infrastructure Engineering team is responsible for the design, implementation, operation, and continuous improvement of the infrastructure stack that underpins all internal and customer-facing services. This specialist role is focused on the OpenStack networking stack, with particular emphasis on Neutron and its associated technologies, including OVN, Open vSwitch, routing, DHCP, metadata services, tenant isolation, and network automation. The role is critical to ensuring the availability, scalability, performance, and security of the networking layer across our cloud platforms. The role also acts as a key link into the upstream OpenStack community, helping ensure that Nscale both benefits from and contributes to the evolution of Neutron and related networking projects. This team ensures high levels of availability, scalability, automation, and security for the infrastructure layers they own. This team acts as a 3rd/4th line escalation point for support organisations, as well as providing subject matter expertise to pre-sales and other groups within the organisation. What You’ll be Doing (Responsibilities) Designing, implementing, and operating scalable, resilient, and secure OpenStack networking platforms, with a strong focus on Neutron and OVN/OVS. Owning the architecture and day-to-day operation of virtual networking services, including L2/L3 networking, DHCP, metadata, floating IP, NAT, security groups, and tenant segmentation. Troubleshooting complex control plane and data plane issues across OpenStack networking components and the underlying Linux networking stack. Driving continuous improvement in network automation, provisioning, validation, monitoring, and recovery using infrastructure-as-code and configuration management tools. Working closely with compute, storage, and platform engineering teams to ensure seamless integration between Neutron and the wider OpenStack ecosystem. Leading performance tuning, scalability planning, and resilience improvements for network-heavy and latency-sensitive cloud workloads. Acting as a 3rd/4th line escalation point for advanced networking incidents, conducting root cause analysis, and driving permanent fixes. Supporting upgrades, lifecycle management, and change execution across OpenStack networking services with a strong focus on service continuity and operational excellence. Contributing specialist input to infrastructure roadmap planning, platform standards, and solution design for customer and internal environments. Supporting pre-sales and solution design activities by providing expert guidance on cloud networking capabilities, constraints, and best practices. Contributing to upstream OpenStack networking communities, particularly Neutron and related projects such as OVN, through bug reports, code contributions, design discussions, testing, and reviews where appropriate. Tracking upstream roadmaps, release changes, and community direction to help shape Nscale's networking strategy, upgrade planning, and platform standards. Representing Nscale's operational requirements and real-world use cases in upstream discussions to help drive improvements that benefit both the business and the broader community. Ensuring OpenStack networking platforms adhere to security, compliance, and operational standards. Participating in on-call rotations and incident response activities for critical infrastructure services. About You (Skills / Qualifications Experience) Strong Linux systems administration and troubleshooting experience. Deep hands-on experience deploying, operating, upgrading, and troubleshooting large-scale OpenStack environments. Strong specialist knowledge of Neutron, including ML2, OVN, Open vSwitch, routing, DHCP, metadata, provider networks, tenant networks, VLAN/VXLAN/Geneve, and security groups. Strong understanding of Linux networking concepts including routing, bridging, namespaces, iptables/nftables, bonding, MTU, and packet flow analysis. Strong experience investigating complex network behaviour using diagnostic and observability tools such as tcpdump, iproute2, ovs/ovn tooling, logs, and metrics. Strong experience designing and building automation for cloud infrastructure using tools such as Ansible. Strong Python and Bash skills. Experience working with highly available production platforms and change management in mission-critical environments. Ability to collaborate across infrastructure, support, and architecture teams to solve complex technical problems. Experience contributing to or working closely with upstream open-source communities is highly desirable, particularly within OpenStack, Neutron, OVN, Open vSwitch, or related networking projects. Ability to evaluate upstream changes, influence technical direction, and translate community developments into practical outcomes for production platforms. Experience with OpenStack networking at scale in service provider, private cloud, or high-performance infrastructure environments is highly desirable. Experience with BGP, EVPN, load balancing, or network services integration in OpenStack environments would be beneficial. Equal Opportunities Statement At Nscale, we are committed to fostering an inclusive, diverse, and equitable workplace. We believe that a variety of perspectives enriches our work environment, and we encourage applications from candidates of all backgrounds, experiences, and abilities. We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds. If there’s anything we can do to accommodate your specific situation, please let us know. The responsibilities outlined in this job description are not exhaustive and are intended to provide a general overview of the position. The employee may be required to perform additional duties, tasks, and responsibilities as assigned by management, consistent with the skills and qualifications required for the role. The range below reflects the base salary for the position. Actual compensation may vary based on job-related factors such as skill set, experience, education, and location. In addition to base salary, this role may be eligible for bonus, equity, and/or commission programs. Nscale may offer a competitive benefits package including medical, dental, vision, flexible paid time off, parental leave, and retirement plan participation. Salary Range$150,000—$220,000 USDFor information on how Nscale handles candidate personal data, please see our Employee & Candidate Privacy Notice: Here.