Senior Network Engineer

JR United Kingdom; North East; Remote; GBP 50,000 - 85,000; Full time

Job summary

A leading company is seeking a Senior Network Engineer to support design and deployment in a highly technical environment. The ideal candidate will focus on Arista-based networks, drive automation, and ensure high-resilience infrastructure. This long-term rolling contract offers the opportunity to work with cutting-edge technology in performance-critical environments.

Qualifications

• Relevant certifications (CCNP R&S, CCNP DC, PCNSA, ACI Specialist, or CCIE in progress) are a strong plus.
• Experience with monitoring tools (SolarWinds, PRTG, Logic Monitor) and SNOW for incident/change management.

Responsibilities

• Lead the design, deployment, and optimisation of Arista-based data centre networks.
• Build and maintain network automation scripts using Python, Nornir, and Ansible.
• Provide senior-level L3 support, mentor junior engineers, and drive best practices.

Skills

Network automation

BGP

Arista EOS

Python

Ansible

EVPN

Multicast

Documentation skills

Cisco Nexus

Tools

CloudVision

Job description

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Senior Network Engineer, newcastle-upon-tyne, tyne and wear

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Client:

Square One Resources

Location:

newcastle-upon-tyne, tyne and wear, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

3

Posted:

26.06.2025

Expiry Date:

10.08.2025

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Job Description:

Location: United Kingdom (Remote, with occasional site visits if needed)

Contract Type: Long-term rolling contract

We are seeking an experienced Senior Network Engineer with a proven background in Arista-based data centre networks and a strong focus on network automation. The successful candidate will join a highly technical environment supporting the design, deployment, and ongoing optimisation of low-latency, high-availability infrastructure across global data centres.

You’ll work with a modern network stack (Arista EOS, CloudVision, Python, Nornir, Ansible) and interface closely with architecture, security, and DevOps teams to drive automation and resiliency in a performance-critical environment.

Key Responsibilities

• Lead the design, deployment, and optimisation of Arista-based data centre networks, with a focus on low-latency and high resilience.
• Configure and troubleshoot BGP, EVPN (VXLAN), and Multicast (PIM, IGMP) in complex enterprise environments.
• Use Arista CloudVision for orchestration, telemetry, and automated configuration management across global environments.
• Build and maintain network automation scripts using Python, Nornir, and Ansible, ensuring repeatability and alignment with infrastructure-as-code practices.
• Support large-scale hardware refreshes and migrations from Cisco to Arista, ensuring minimal downtime in production environments.
• Collaborate with global teams to align network delivery with broader CI/CD pipelines, and implement proactive monitoring and remediation frameworks.
• Provide senior-level L3 support, mentor junior engineers, and drive best practices in operational excellence.
• Strong hands-on experience with Arista EOS in complex enterprise or global data centre environments.
• Deep knowledge of routing protocols (BGP, OSPF, EVPN) and Multicast technologies.
• Demonstrated experience working with Arista CloudVision in both greenfield and brownfield deployments.
• Background in low-latency networks – ideally within financial services or other performance-critical environments.
• Proficiency in network automation using Python, Ansible, Nornir, and version control tools (Git).
• Solid grounding in Layer 2/3 principles, troubleshooting, and production change management.
• Excellent documentation and communication skills; able to work collaboratively across global teams.
• Experience with Cisco Nexus platforms (2k–9k) and migrations to Arista.
• Exposure to network security platforms (Palo Alto, Fortinet, F5).
• Familiarity with CI/CD pipelines and infrastructure-as-code principles.
• Experience with monitoring tools (SolarWinds, PRTG, Logic Monitor) and SNOW for incident/change management.
• Relevant certifications (CCNP R&S, CCNP DC, PCNSA, ACI Specialist, or CCIE in progress) are a strong plus.