Sr. Network Engineer - Data Center and Cloud (Hybrid, London)

Location: Hybrid, London, United Kingdom

Company

CrowdStrike is a global cybersecurity company developing an AI-native platform that protects modern organizations and processes nearly 3 trillion events per day.

What you will do

• Translate business requirements into network designs, reference architectures, HLDs, design reviews, runbooks, POCs, and FOAs.
• Design, implement, and operate global multi-vendor, multi-cloud, and hybrid data center networks at scale.
• Deploy and manage cloud networking constructs including subnet allocations, routing tables, VPCs, peering, PrivateLink, hub-and-spoke topologies, gateways, and direct connects.
• Develop infrastructure as code and automation tooling with Ansible, Terraform, Python, and Go across CI/CD pipelines.
• Troubleshoot complex production issues, contribute to root-cause analysis, and participate in on-call rotations.
• Implement network solutions that meet ISO 27001, Cyber Essentials Plus, UK G-Cloud, EU data residency/GDPR, and PCI-DSS requirements.

Requirements

• Proven ability to independently drive agile cross-functional projects to completion 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, Ansible, Terraform, Chef, Bash, Python, Go, Jinja, YAML, and JSON.
• Proven experience using AI technologies to improve decision-making, streamline workflows and processes, increase efficiency, and drive business outcomes.

Nice to have

• CCIE or JNCIE certification, or professional-level AWS, GCP, OCI, or Azure certification.
• Hyperscaler or CSP background, including AWS, GCP, Microsoft, OCI, or similar.
• OpenStack, SONiC, whitebox, FRR, or open-source network infrastructure experience.
• AI/GPU cluster networking fabric experience with RDMA, RoCE, or InfiniBand.
• UK Government, G-Cloud, or sovereign cloud experience.

Culture & Benefits

• Full-time employment with a hybrid working arrangement and vibrant office culture.
• Compensation and equity awards, comprehensive physical and mental wellness programs, and competitive vacation and holidays.
• Paid parental and adoption leave.
• Professional development opportunities for employees at all levels.
• Employee networks, geographic neighborhood groups, volunteer opportunities, and workplace amenities.
• Equal opportunity employment with support for veterans and individuals with disabilities.