Network Engineer

Ocean Red; Greater London; On-site; GBP 65,000 - 90,000; Full time

Job summary

Ocean Red in London seeks an experienced Network & Security Engineer to maintain low-latency trading infrastructure across cloud and on-premises environments. You will monitor, troubleshoot and optimize live platforms, work with telecoms on circuits, and contribute to capacity planning while documenting procedures.

You will join a small team, handle incidents, and progressively take ownership of infrastructure projects, with a keen eye for reliability in financial markets.

Qualifications

• Four or more years in network and security support engineering, ideally in a financial-services or similarly business-critical environment.
• Hands-on experience with TCP/IP, routing, switching, firewalls, RSTP, OSPF and BGP
• Strong troubleshooting skills using Wireshark, tcpdump, syslog, network monitoring platforms and firewall traffic logs

Responsibilities

• Monitor and maintain network and security infrastructure, identifying faults before they become wider issues
• Investigate incidents using monitoring tools, logs and packet captures, then help drive root-cause analysis
• Support client connectivity, access requests and decommissioning
• Work with telecoms providers to resolve circuit, leased-line and connectivity issues
• Deliver and validate planned network and security changes
• Support live platforms during operational hours and contribute to capacity planning
• Maintain network diagrams, procedures and operational documentation
• Contribute to infrastructure projects, taking on greater ownership as you grow

Skills

Routing

Switching

Firewalls

OSPF

BGP

Packet analysis

Tools

Fortinet

Arista EOS

PTP

Multicast

AWS networking

Ansible

Python

IPsec VPNs

Job description

Company | Technology-led financial markets business

Impact | Keep low-latency trading and security infrastructure reliable, resilient and ready to scale

Environment | Small expert team, live production platforms, cloud and on-premises infrastructure

Skills | Routing, switching, firewalls, OSPF, BGP, packet analysis

Location | London, with occasional data-centre visits

Hours | Shift rota between 06:30 and 18:30, with occasional weekend and bank-holiday cover

The Role

You’ll work on infrastructure where reliability is not theoretical. Your work will help keep live trading platforms, client connectivity and security services operating as they should, while giving you room to take on increasingly substantial project work.

You’ll join a small network team responsible for a low-latency estate spanning cloud and on-premises environments. That means a genuine mix of hands-on troubleshooting, planned change, capacity planning and client onboarding. You’ll investigate issues using monitoring data, logs and packet captures, work with telecoms providers on circuits and leased lines, and see the outcome of your work in a live environment.

This is a good fit if you enjoy methodical problem-solving, take pride in clear documentation and want to deepen your expertise in financial markets infrastructure. You’ll be trusted to contribute ideas, improve how the team works and learn from engineers who care about doing things properly.

What you’ll do

• Monitor and maintain network and security infrastructure, identifying faults before they become wider issues
• Investigate incidents using monitoring tools, logs and packet captures, then help drive root-cause analysis
• Support client connectivity, access requests and decommissioning
• Work with telecoms providers to resolve circuit, leased-line and connectivity issues
• Deliver and validate planned network and security changes
• Support live platforms during operational hours and contribute to capacity planning
• Maintain network diagrams, procedures and operational documentation
• Contribute to infrastructure projects, taking on greater ownership as you grow

What you’ll need

• Four or more years in network and security support engineering, ideally in a financial-services or similarly business-critical environment
• Hands-on experience with TCP/IP, routing, switching, firewalls, RSTP, OSPF and BGP
• Strong troubleshooting skills using Wireshark, tcpdump, syslog, network monitoring platforms and firewall traffic logs

Experience with Fortinet, Arista EOS, PTP, multicast, AWS networking, Ansible, Python or IPsec VPNs would be useful, but it is not essential.

***You must be eligible to work in this location to be considered for this role***