Network Engineer (185FB3B)

Referment; Greater London; On-site; GBP 65,000 - 95,000; Full time

Job summary

Referment is expanding its expert Network team in the City of London and is seeking a Network Engineer to support, shape, optimise and scale a low-latency trading network spanning cloud and on-prem environments. You will split time between operations and projects, run daily checks, investigate faults, onboard clients, liaise with telecoms providers and document infrastructure.

The role requires 4+ years in network/security support and hands-on experience with OSPF/BGP, Fortinet, VPNs, and

Qualifications

• 4+ years in a network and security support engineering role, ideally in financial services.

Responsibilities

• Run daily checks of the network and security infrastructure and investigate faults using logs and packet captures.

Skills

Network engineering

Security support

OSPF

BGP

RSTP

Firewall management

VPN configuration

Packet analysis

Wireshark

Tools

Fortinet

Arista EOS

Ansible

Python

SolarWinds

tcpdump

Wireshark

Job description

Referment is working with a regulated European stock exchange operator based in the City of London. Its small, expert Network team is expanding and is looking for a Network Engineer to support, shape, optimise and scale a low-latency trading network that spans cloud and on-premises environments.

The Role

You'll split your time between daily operations and project work. On the operational side, you'll run daily checks of the network and security infrastructure, investigate faults using logs, monitoring tools and packet captures, and support the live trading platforms during market hours. You'll manage client onboarding, access requests and decommissioning, liaise with telecoms providers on leased lines and circuits, and support and validate planned network and security changes. You'll also maintain high-quality documentation of the infrastructure and participate in incident investigation and root-cause analysis.

There's room to take on increasing responsibility for project-based delivery as your experience develops. You'll work a shift rota covering 06:30–18:30, with occasional weekend and Bank Holiday cover and occasional data centre visits in West and East London.

What We're Looking For

• 4+ years in a network and security support engineering role, ideally in financial services.
• CCNP/ACE-P or equivalent experience, with hands-on OSPF and BGP and support/configuration experience of RSTP.
• Firewall cluster and centralised firewall manager experience — Fortinet is advantageous.
• Strong TCP/IP, Spanning Tree, routing and firewall fundamentals, plus IPSEC site-to-site and remote VPN configuration.
• Monitoring and troubleshooting with Wireshark, tcpdump, syslog and SolarWinds or an equivalent platform.

Desirable: PTP understanding, multicast/PIM/RPs, AWS networking, Arista EOS and network automation (Ansible/Python).

This could suit a network engineer from a trading, banking or telecoms background who wants broader ownership in a small team close to a live exchange platform.

#Referment