Network Engineer

Senior Network Engineer (Low Latency/Co-Location) - 6 Month Contract - Inside IR35 - London Office

Contract Type: 6-Month Contract (Inside IR35)

Rate: £600 per day (can be negotiable)

Location:

London (Soho)

Working closely with the Low Latency Co‑Location Team Lead, the Senior Network Engineer will be responsible for the design, deployment, and support of high‑performance network infrastructure within client data centre and exchange co‑location environments.

The role focuses on delivering low‑latency routing and switching solutions across multiple exchanges and global infrastructure environments. You will operate within a complex, multi‑vendor network environment and play a key role in implementing scalable, resilient connectivity solutions while adapting to evolving technology and procurement challenges.

• Design, build, and maintain high-performance, low-latency network infrastructure within exchange and co-location environments.
• Implement routing and switching solutions across multi-vendor platforms, particularly Cisco and Arista.
• Support and evolve global WAN connectivity and cloud networking solutions.
• Configure and troubleshoot multicast network environments used for market data distribution.
• Deploy and support low-latency timing infrastructure, including GPS, PTP, NTP, and PPS systems.
• Install and maintain infrastructure within co-location facilities including rack‑and‑stack, cross-connects, and vendor coordination.
• Implement and operate packet capture, monitoring, and network analysis tools to troubleshoot performance and latency issues.

• Proven experience as a network engineer in complex, multi‑vendor environments.
• Hands‑on experience working in data centre or co‑location environments.
• Experience supporting low‑latency or performance‑sensitive network infrastructure.
• Previous exposure to exchange or financial trading connectivity environments is advantageous.
• Strong hands‑on experience with routing and switching technologies.
• Strong operational experience with Cisco and Arista networking platforms.
• Solid understanding of core networking protocols and concepts including: BGP, OSPF, VLANs, Spanning Tree (STP), QoS, Layer 2 and Layer 3 troubleshooting.
• Experience configuring and supporting multicast networking.
• Familiarity with Fortinet Firewalls.
• Experience implementing network timing solutions (GPS, PTP, NTP, PPS).