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# Senior Network Engineer - Trading Infrastrcuture (282ECD5)

- **Company:** Referment Limited
- **Location:** Cookstown, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** IEEE 802.1Q, Border Gateway Protocol, Complex Networks, System Configuration, Data Centers, InfiniBand, Internet Protocol Security (IP SEC), Subnetting, Virtual Private Networks (VPN), Network Security, Network Architecture, Virtual Local Area Networks, Network Routers, Computer Networking Systems, Computer Network Operations, Firewalls (Computer Science), Juniper, Fortinet, Cisco
- **Published:** September 15, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/senior-network-engineer-trading-infrastrcuture-282ecd5/47163452

## About the Role

infrastructure changes.Supporting network changes and infrastructure projects.Maintaining routing, switching, VPN and firewall configurations.Supporting hosted and data-centre environments.Contributing to project planning, implementation and risk management.Working closely with other infrastructure and engineering teams. What We're Looking For You'll Ideally Have 5+ years' network engineering experience within hosted, production or similarly demanding environments.Strong experience with Juniper, Cisco and/or Arista networking equipment.Strong knowledge of BGP and OSPF.Good understanding of subnetting, VLANs, VLAN tagging and NAT.Experience configuring IPSec VPNs and GRE tunnels.Strong understanding of network security.Experience working with firewalls such as Fortinet, Check Point, Juniper SRX or Cisco ASA.Hands-on data-centre experience including racking, cabling and patching.Strong troubleshooting and diagnostic skills.Experience working with vendors and other technical teams.The ability
to operate effectively within business-critical production environments. Experience with multicast networking would be particularly valuable. Exposure to InfiniBand, RoCE or other high-performance networking technologies would also be beneficial. Previous experience within electronic trading, market data, exchanges, investment banking, hedge funds or other financial-markets technology environments would be particularly relevant. This could suit a Senior Network Engineer, Network Engineer, Network Infrastructure Engineer, Trading Network Engineer or Network Operations Engineer looking to work with sophisticated financial-markets infrastructure. #Referment #J-18808-Ljbffr

## Description

Referment is working with a global financial technology business to hire a Senior Network Engineer to support highly available, business-critical infrastructure used across electronic trading and financial markets. You'll work across production, corporate and development networks, taking responsibility for day-to-day network operations while supporting infrastructure changes and wider engineering projects. This is a hands-on position suited to someone with strong networking fundamentals and experience supporting demanding production environments where performance, resilience and availability are critical. The Role You'll Be Responsible For Supporting business-critical production and development networks.Administering and maintaining network and security infrastructure.Troubleshooting complex network and connectivity issues.Installing, configuring and maintaining switches, routers and other network devices.Working with third-party vendors to resolve production issues and implement


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