Sr. Network Engineer - Data Center and Cloud

Salary: £65,000 - 105,000 per year

Requirements:

• Proven track record of driving agile cross-functional projects to completion independently with minimal supervision
• 7+ years of expert design and hands-on experience with IPv4/IPv6, Anycast, MP-BGP, OSPF/IS-IS, MPLS, EVPN/VxLAN, L3VPN, CLOS, QoS, load-balancing, MACsec, and IPsec
• 5+ years of practical multi-cloud networking experience deploying and supporting cloud connectivity at a hyperscaler, CSP, or security company
• Extensive experience deploying and maintaining large networks using version control, automation frameworks (Ansible, Terraform, Chef), and scripts and templating (bash, Python, Go, Jinja, YAML, JSON)
• Proven experience using AI technologies to enhance decision-making, streamline workflows and processes, improve efficiency, and drive business outcomes
• Bonus points for CCIE/JNCIE or AWS/GCP/OCI/Azure professional certifications
• Bonus points for hyperscaler/CSP background (AWS, GCP, MSFT, OCI or similar)
• Bonus points for OpenStack, SONiC, whitebox, FRR, or open source network infrastructure experience
• Bonus points for AI/GPU cluster networking fabrics experience, including RDMA, RoCE, and InfiniBand
• Bonus points for UK Government, G-Cloud, or sovereign cloud experience

Responsibilities:

• Translate business requirements into practical network design, reference architectures, design patterns, HLDs, design reviews, runbooks, POCs, and FOAs
• Design, operate, and implement global multi-vendor, multi-cloud, hybrid data center networks at scale while driving network performance and resiliency
• Deploy and manage cloud constructs such as subnet allocations, routing tables and associations, VPCs, VPC peering/PrivateLink, hub-spoke topologies, gateways, and direct connects
• Develop and maintain infrastructure as code and automation tooling throughout the CI/CD pipeline to provision networks at scale and improve the efficiency and velocity of network deployments
• Troubleshoot complex production issues and contribute to incident root-cause analysis
• Participate in on-call rotations
• Implement network solutions that meet regional compliance and data sovereignty requirements, including ISO 27001, Cyber Essentials Plus, UK G-Cloud, EU data residency/GDPR, and PCI-DSS

Technologies:

• AI
• AWS
• Ansible
• Azure
• Bash
• CI/CD
• Cloud
• GCP
• InfiniBand
• JSON
• MPLS
• Network
• OpenStack
• Python
• RDMA
• Security
• Terraform
• DevOps
• Support

More:

We are CrowdStrike, a global leader in cybersecurity, protecting the people, processes, and technologies that drive modern organizations. Our mission is to stop breaches, and we do this through the worlds most advanced AI-native platform while operating at massive scale across large distributed systems processing almost 3 trillion events per day and growing. We offer flexibility and autonomy, a mission-driven culture focused on responsible AI adoption, experimentation, and innovation, and a collaborative environment built on customer commitment. We also provide market-leading compensation and equity awards, comprehensive physical and mental wellness programs, competitive vacation and holidays, paid parental and adoption leave, professional development opportunities, employee networks, volunteer opportunities, a vibrant office culture, and global Great Place to Work recognition. This role is part of our Data Center & Cloud Network Engineering team, based in London, United Kingdom.

last updated 36 week of 2026