Senior Network Engineer – Trading Infra & Security

Aquis Exchange PLC; City Of London; On-site; GBP 70,000 - 95,000; Full time

Job summary

Aquis Exchange PLC is seeking a capable Network Engineer to support, shape, optimise, and scale our low-latency trading infrastructure in London. You will join a small, expert Network team working across cloud, on-prem, and exchange platforms—contributing to strategic projects and hands-on engineering.

The role requires strong problem-solving, client onboarding experience, and a proactive approach to improving network and security infrastructure.

Qualifications

• 4+ years in a Network and Security support engineering role, ideally within a financial environment.
• CCNP/ACE-P or equivalent networking experience.
• Experience with telecommunication providers and leased lines.
• Strong understanding of TCP/IP, Spanning Tree, Routing, Firewalls.
• Experience with OSPF, BGP.
• Firewall cluster management; Fortinet experience advantageous.
• Strong network monitoring and troubleshooting with Wireshark, TCPdump, Syslog, Solarwinds.
• IPsec Site-to-Site and Remote VPN experience.
• Good teamwork and communication skills.
• Experience with network documentation and operational procedures.
• Willingness to learn new technologies.

Responsibilities

• Perform daily operational checks of the Network and Security infrastructure, identifying faults.
• Troubleshoot network/security issues using logs, captures to identify root cause.
• Manage client onboarding and access requests.
• Liaise with telecom providers to troubleshoot leased lines and connectivity.
• Support planned network/security changes with validation and checks.
• Monitor capacity plans for network infrastructure.
• Support live exchange platforms during operations.
• Document network and security infrastructure thoroughly.
• Participate in incident investigations and root-cause analysis.
• Assist internal teams as required.
• Contribute to network/security projects and take increasing responsibility.
• Participate in shift rota 06:30–18:30; occasional weekends/bank holidays.
• Occasional Data Centre visits in London.

Skills

5+ years in network/security

CCNP/ACE-P

TCP/IP

Spanning Tree

OSPF/BGP

Firewalls

RSTP

VPN/IPsec

Wireshark

TCPdump

Syslog

Solarwinds

Fortinet

Arista EOS

AWS networking

Ansible/Python

Teamwork/communication

Tools

Fortinet

Arista EOS

AWS networking

Ansible

Python

Job description

Aquis Exchange PLC is seeking a capable Network Engineer to support, shape, optimise, and scale our low-latency trading infrastructure in London. You will join a small, expert Network team working across cloud, on-prem, and exchange platforms—contributing to strategic projects and hands-on engineering.

The role requires strong problem-solving, client onboarding experience, and a proactive approach to improving network and security infrastructure.