Network Engineer

Cantor Fitzgerald Ireland Ltd; Greater London; On-site; GBP 75,000 - 110,000; Full time

Job summary

Cantor International Services in London is seeking a senior Network Engineer to lead design, deployment, and evolution of its global financial network. You will own end-to-end delivery, coordinate third-party service turn-ups, and act as senior escalation for complex incidents.

The role focuses on routing/switching design (Juniper, Arista, Cisco), EVPN/VXLAN on Arista EOS, and automation with Python/Ansible. Operational excellence and mentoring cross-regional teams are key."

Qualifications

• Bachelor's degree in CS or Engineering or equivalent experience.
• CCNP Routing & Switching certification required.
• Wireless foundation certification required.
• Strong routing/switching design on Junos, Arista EOS, Cisco IOS.
• Hands-on EVPN/VXLAN on Arista platforms essential.
• Experience with Palo Alto firewalls and F5 load balancers.
• Proficient in Python and Ansible for automation.
• Demonstrated incident escalation and root-cause analysis.

Responsibilities

• Design and implement data-centre and enterprise network solutions.
• Deliver end-to-end network projects including build and cut-over.
• Turn up third-party services like CDN, VPN connections.
• Lead routing and switching design on Juniper, Arista, Cisco platforms.
• Design and support EVPN/VXLAN fabrics on Arista EOS.
• Serve as senior escalation for complex incidents and root-cause resolutions.
• Develop network automation and tooling using Python, Ansible, Git.
• Improve monitoring via Grafana, Splunk, ServiceNow and AI tools.
• Maintain hygiene through code upgrades, EOL replacement, audits.
• Mentor junior engineers and coordinate global hand-overs.

Skills

Incident escalation

Mentoring

Documentation

Automation mindset

Education

Bachelor's degree in Computer Science or Engineering

Cisco CCNP Routing & Switching

Wireless foundational certification

Tools

Junos

Arista EOS

Cisco IOS

Palo Alto

F5 BIG-IP

Python

Ansible

Job description

The Network Engineer will lead the design, deployment, and evolution of Cantor International Services' global financial network across data centres, trading floors, and enterprise sites. You will own end‑to‑end project delivery, third‑party service turn‑ups, and serve as the senior technical escalation point for complex network incidents, while driving automation and innovative AI‑based solutions to improve operations.

Responsibilities

• Design and implement data‑centre and enterprise network solutions, including new builds, platform refreshes, and site migrations.
• Deliver network projects end‑to‑end: design documentation, build, testing, cut‑over, and handover to operations.
• Turn up and support third‑party services such as CDN, extranet, and VPN connections.
• Lead routing and switching design on Juniper, Arista, and Cisco platforms (BGP, OSPF, EIGRP, redistribution, filtering).
• Design, build, and support EVPN/VXLAN fabrics on Arista EOS.
• Act as senior escalation for complex incidents, conduct root‑cause analysis, and implement permanent fixes.
• Develop network automation and tooling using Python, Ansible, and Git to eliminate manual processes.
• Enhance monitoring and alerting (Grafana, Splunk, ServiceNow) and apply AI tools for proactive troubleshooting.
• Maintain infrastructure hygiene through code upgrades, EOL hardware replacement, and regular network audits.
• Mentor junior engineers, ensure accurate documentation, and coordinate hand‑overs across global regions.

Qualifications

• Cisco CCNP Routing & Switching certification.
• Wireless foundational certification (required).
• Bachelor’s degree in Computer Science, Engineering, or related field, or equivalent experience.
• Strong routing and switching design experience on Junos, Arista EOS, and Cisco IOS (BGP, OSPF, EIGRP).
• Hands‑on EVPN/VXLAN design and implementation on Arista platforms.
• Practical experience with Palo Alto firewalls and F5 load balancers.
• Proficiency in scripting/automation (Python, Ansible) applied to network problems.
• Proven ability to manage high‑pressure incident escalations and drive root‑cause resolutions.
• Experience mentoring junior staff and producing clear technical documentation.

Job Info

• Job Identification 250274
• Posting Date 10/19/2026, 11:17 AM
• Locations Five Churchill Place, London, Canary Wharf, E14 5HP, GB