Network Engineer III - Backbone (Hybrid, London)

CrowdStrike; Greater London; On-site; GBP 90,000 - 140,000; Full time

Job summary

CrowdStrike is seeking a network engineer to design and operate a hyper-scale hybrid cloud backbone. You will build and maintain the production network across multiple cloud providers and lead major improvement initiatives from ideation to implementation.

You will own IP and Optical networks, drive capacity planning, and partner with security teams to ensure scalable, resilient services. This role requires hands-on networking expertise and on-call availability.

Qualifications

• 5+ years of experience building and maintaining large scale data center networks.
• Expert in large-scale IP networking (MP-BGP, OSPF, ISIS, VRF, VxLAN/EVPN, QoS).
• Experience with cloud providers AWS, GCP, OCI and IaC tooling.

Responsibilities

• Build and maintain a high‑performance production network at scale.
• Analyze requirements and develop solutions of technical problems based on complex business needs.
• Hold regular project meetings to address challenges and drive milestones.
• Represent the network team as a technical leader and provide direction for projects and problem management.
• Improve reliability and efficiency of network operations and practices.
• Drive capacity planning and create plans for growth.
• Evaluate technologies for scale, security, and maintainability.
• Support development, testing and integration of new hardware/software platforms.
• Participate in 24x7 on‑call rotation.

Skills

5+ years experience

AI in network operations

Tools

MP-BGP

OSPF

ISIS

VRF

VxLAN

EVPN

QoS

GRE

IPsec

DNS

MACsec

Optical/DWDM

CDN

edge security

DDoS mitigation

load balancing

AWS

GCP

OCI

Python

Ansible

YAML

Netconf/YANG

Chef

Puppet

Git workflows

CI/CD

Jenkins

Arista

Palo Alto

Juniper

Adva

Nokia

Cisco

HP

AI technologies

Job description

As a global leader in cybersecurity, CrowdStrike protects the people, processes and technologies that drive modern organizations. Since 2011, our mission hasn’t changed — we’re here to stop breaches, and we’ve redefined modern security with the world’s most advanced AI-native platform. We work on large scale distributed systems, processing almost 3 trillion events per day and this traffic is growing daily. Our customers span all industries, and they count on CrowdStrike to keep their businesses running, their communities safe and their lives moving forward. We're proud to work for a mission‑driven company leveraging AI to transform the way we work. CrowdStrikers drive their careers through flexibility and autonomy while also being expected to contribute to a culture of responsible AI adoption, experimentation, and innovation. We use an AI‑first mindset as a force multiplier to proactively and continuously accelerate execution, build expertise, uncover insights, and solve complex problems. We’re always looking to add talented CrowdStrikers to the team who have limitless passion, a relentless focus on innovation and a fanatical commitment to our customers, our community and each other. Ready to join a mission that matters? The future of cybersecurity starts with you.

About The Role

CrowdStrike is looking for a network engineer who has a solid track record of building and operating hyper‑scale hybrid cloud networks. In this role, you will build and maintain the production backbone network as well as services across multiple cloud service providers. You will develop and support both the IP and Optical technologies that connect our data centers as well as edge connectivity. In addition, you will own major improvement initiatives from ideation to implementation, including funding, planning and operational support.

What You’ll Do

• Build and maintain a high‑performance and fault‑tolerant production network at‑scale
• Analyze requirements and develop solutions of technical problems based on complex business needs
• Hold regular, frequent project meetings to address challenges and drive milestones
• Represent the network team as a technical leader and provide direction and insight for projects, discovery, and problem management
• Improve the reliability and efficiency of network operations and practices
• Drive capacity planning, forecasting, and create plans for growth
• Evaluate technologies for scale, security, and maintainability
• Support the development, testing and integration of new hardware and software platforms
• Participate in 24x7 on‑call rotation

What You’ll Need

• 5+ years of experience in building and maintaining large scale, backbone and complex data center network infrastructure
• Expert level knowledge in large scale IP networking technologies and protocols such as: MP‑BGP, OSPF, ISIS, VRF, VxLAN, EVPN, QoS, GRE, IP SEC, DNS, MACsec
• Expert in building and operating large scale networks using technologies, such as optical/DWDM, CDN, edge network security, DDoS mitigation, load balancing
• Experience building solutions in cloud service providers such as AWS, GCP, OCI
• Hands‑on experience with infrastructure‑as‑code using tools such as Python, Ansible, YAML, or Netconf/YANG, Chef, Puppet
• Understanding of Git workflows, CI/CD concepts and how they can be applied to network automation and a testing framework
• Experience in building end‑to‑end pipelines with CI tools such as Jenkins
• Proficient with various networking vendors such as Arista, Palo Alto, Juniper, Adva, Nokia, Cisco, HP, etc
• Proven experience utilizing AI technologies to enhance decision‑making, streamline workflows and processes, improve efficiency and drive business outcomes

Bonus Points

• Work experience in data center, telecom, SaaS, or cloud operations companies
• Experience with building and supporting optical infrastructure such as Infinera, Ciena, Nokia
• Proficiency with Excel, and other modeling systems
• Ability to communicate technical detail into succinct and fact‑based business terminology, both verbally and in writing
• Customer‑focused mindset, with demonstrated skill in managing expectations, providing proactive status updates, and producing high‑quality work products
• Ability to use independent judgment to make sound, justifiable decisions and take action to solve problems
• Strong leadership skills with demonstrated ability to prioritize and execute in a methodical and disciplined manner
• Ability to plan, organize and prioritize work independently and meet deadlines
• Ability to work in a collaborative, team environment

Benefits Of Working At CrowdStrike

• Market leader in compensation and equity awards
• Comprehensive physical and mental wellness programs
• Competitive vacation and holidays for recharge
• Paid parental and adoption leaves
• Professional development opportunities for all employees regardless of level or role
• Employee Networks, geographic neighborhood groups, and volunteer opportunities to build connections
• Vibrant office culture with world‑class amenities
• Great Place to Work Certified across the globe

CrowdStrike is proud to be an equal opportunity employer. We are committed to fostering a culture of belonging where everyone is valued for who they are and empowered to succeed. We support veterans and individuals with disabilities through our affirmative action program.

CrowdStrike is committed to providing equal employment opportunity for all employees and applicants for employment. The Company does not discriminate in employment opportunities or practices on the basis of race, color, creed, ethnicity, religion, sex (including pregnancy or pregnancy‑related medical conditions), sexual orientation, gender identity, marital or family status, veteran status, age, national origin, ancestry, physical disability (including HIV and AIDS), mental disability, medical condition, genetic information, membership or activity in a local human rights commission, status with regard to public assistance, or any other characteristic protected by law. We base all employment decisions—including recruitment, selection, training, compensation, benefits, discipline, promotions, transfers, lay‑offs, return from lay‑off, terminations and social/recreational programs—on valid job requirements.

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