Network Engineer
About the Company We are a high-growth, European pan-regional financial technology company and challenger transaction venue operator. As part of a major international financial market infrastructure group, we build, operate, and license cutting-edge, low-latency exchange technology globally. Our business thrives on a culture of positive disruption, transparency, and high performance. We provide a highly collaborative, fast-paced environment where engineers are given genuine ownership of infrastructure, working alongside industry-leading specialists to modernise financial market tech.
The Role We are seeking a skilled and analytical Network Engineer to join our expert, tight-knit Network team. In this role, you will help support, shape, optimise, and scale a high-performance network spanning low-latency trading infrastructure, on-premises data centres, and cloud environments. This is a phenomenal opportunity for an engineer who thrives in high-stakes, fast-paced financial environments. You will balance day-to-day operational excellence and client onboarding with strategic, hands-on engineering projects aimed at continually improving our core network and security posture.
Key Responsibilities Operations & Infrastructure Monitoring: Perform daily operational checks across our core network and security infrastructure, proactively identifying and mitigating anomalies. Troubleshooting & Analysis: Methodically diagnose network issues using logs, monitoring tools, and deep packet captures to isolate root causes. Client Onboarding: Manage the technical lifecycle of client access requests, connectivity onboarding, and decommissioning. Provider Liaising: Coordinate with telecommunications and network service providers to provision and troubleshoot leased lines, circuits, and external connectivity. Change Management: Support and execute planned network changes, conducting rigorous validation and post-change functionality checks. Data Centre & Live Platform Support: Monitor live financial platforms during trading hours, which includes occasional hands-on visits to our East and West London data centres. Documentation & Continuous Improvement: Create and maintain pristine network diagrams, capacity plans, and operational procedures.
What You Bring Financial Market Experience: 4+ years of dedicated experience in a Network and Security engineering support role, ideally within a trading or financial environment. Certification / Knowledge Base: CCNP level or equivalent deep networking experience. Core Routing & Switching: Strong mastery of TCP/IP, Spanning Tree protocols (including RSTP configuration), OSPF, and BGP. Security & Hardware Expertise: Hands-on experience configuring and troubleshooting firewall clusters, centralised firewall managers, and enterprise infrastructure (Cisco environment experience and Fortinet technologies are highly beneficial). Diagnostics Toolkit: Proficient with network monitoring and analysis tools such as Wireshark, TCPdump, Syslog analysis, and SolarWinds (or equivalent). Communication Style: Excellent collaborative skills with the ability to explain complex, technical network anomalies in a pragmatic, clear way to stakeholders.
Highly Desirable Skills (Or areas you want to learn) Exposure to high-performance switching platforms and data centre network architectures, specifically Arista EOS, Cisco Nexus, or Fortinet technologies. Understanding of Precision Time Protocol (PTP) and its application in low-latency environments. Knowledge and practical experience with Multicast, PIM, and Rendezvous Points (RPs). Familiarity with cloud-native networking architectures, specifically AWS. Basic scripting skills for network automation using Python or Ansible.
Location: London (Hybrid, minimum 3 days in the office) Employment Type: Permanent, Full-time Salary: £80/90k + Bonus + Benefits Shift Pattern: Rota covering 06:30 – 18:30 (Occasional weekend and Bank Holiday work required)