Network Operations Engineer

Ocean Red; Greater London; On-site; GBP 40,000 - 60,000; Full time

Job summary

Ocean Red in London is seeking a network operations professional to maintain and scale a low-latency, cloud and on‑premises infrastructure. You’ll focus on reliability, security, and operational excellence across live trading platforms and client connectivity.

The role emphasizes hands‑on routing, switching and firewall work, with opportunities to own changes and participate in capacity planning as you grow within a small expert team.

Qualifications

• Four or more years in network and firewall engineering, with hands‑on RSTP and OSPF, and configured/troubleshot network and security kit on Cisco or Arista.
• Strong understanding of BGP in live environments, even if not in production yet.
• CCNA level certification and interest in network operations and support.

Responsibilities

• Run daily checks on network and security infrastructure, catching faults before they become wider issues
• Investigate incidents using monitoring tools, logs and packet captures, then help drive root-cause analysis
• Handle client onboarding, 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
• Keep network diagrams, procedures and operational documentation up to date
• Contribute to infrastructure projects, taking on more ownership as you grow

Skills

Routing

Switching

Firewalls

OSPF

BGP

Packet analysis

Tools

Cisco

Arista

Job description

Company | Technology-led financial markets business

Team | Network Operations, part of a small network infrastructure team

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

Offer | £40k to £60k for CCNA-level engineers with 4 to 6 years' experience, up to £85k for experienced mid-level engineers

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 don't need a financial markets background for this. You need solid routing and switching, a working grasp of BGP, and an appetite for operations work on infrastructure where reliability is not theoretical.

You'll join a small network team running a low-latency estate across cloud and on-premises environments. Your work keeps live trading platforms, client connectivity and security services running as they should. Day to day, that means hands-on troubleshooting, planned change and client onboarding. You'll dig into issues using monitoring data, logs and packet captures, work with telecoms providers on circuits and leased lines, and see the result of your work in a live environment.

Operations comes first here, with project work growing as you do. If you want to learn exchange-grade infrastructure from engineers who care about doing things properly, this is a good place to do it.

What you’ll do

• Run daily checks on network and security infrastructure, catching faults before they become wider issues
• Investigate incidents using monitoring tools, logs and packet captures, then help drive root-cause analysis
• Handle client onboarding, 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
• Keep network diagrams, procedures and operational documentation up to date
• Contribute to infrastructure projects, taking on more ownership as you grow

What you’ll need

• You have four or more years in network and firewall engineering, with hands‑on RSTP and OSPF, and you've configured and troubleshot network and security kit on Cisco or Arista
• You understand BGP well enough to reason about it in a live environment, even if you haven't run it in production yet
• You hold a CCNA or work at that level, and you actively want to work in network operations and support

You’ll also be comfortable working with network monitoring platforms and documenting what you do.

CCNP or ACE-P, hands‑on BGP, financial services experience, Fortinet, firewall cluster policy management, VPNs, Wireshark or tcpdump, PTP, multicast (IGMP, PIM) and Ansible or Python automation would all help, but none is essential.

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