Sr. Network Engineer - Data Center and Cloud

CrowdStrike; Greater London; On-site; GBP 65,000 - 105,000; Full time

Job summary

CrowdStrike is seeking a senior network engineer in London to design, operate, and scale global multi-vendor, multi-cloud data center networks. You will drive architectural patterns and automation within a fast-growing security platform environment.

Responsibilities include implementing cloud constructs, troubleshooting complex issues, and ensuring compliance and data sovereignty across regions. Ideal candidates bring extensive cloud networking experience and leadership in hybrid networks.

Qualifications

• 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 complex networking and data center fabrics.
• 5+ years of practical multi-cloud networking experience deploying and supporting cloud connectivity at hyperscalers or security companies.
• Extensive experience with automation using version control, and scripting in Bash/Python/Go.
• Experience using AI technologies to enhance decision-making and efficiency.

Responsibilities

• Translate business requirements into practical network design, reference architectures, and runbooks.
• Design, operate, and implement global multi-vendor, multi-cloud, hybrid data center networks at scale.
• Deploy and manage cloud constructs: subnets, VPCs, routing, hub-spoke topologies, gateways, and direct connects.
• Develop infrastructure as code and automation tooling to provision networks at scale.
• Troubleshoot production issues and contribute to incident root-cause analysis.
• Participate in on-call rotations.
• Implement solutions meeting regional compliance and data sovereignty requirements.

Skills

IPv4/IPv6

Anycast

MP-BGP

OSPF/IS-IS

MPLS

EVPN/VxLAN

L3VPN

CLOS

QoS

load-balancing

MACsec

IPsec

AI-driven decision support

Tools

Ansible

Terraform

Chef

Bash

Python

Go

Jinja

YAML

JSON

Job description

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