Lead design and implementation of low-latency trading networks, focusing on automation and collaboration with application teams for performance enhancements.
We are seeking a Senior Network Engineer to join an exciting infrastructure transformation project within a leading investment banking environment. After years of organic growth, the trading network is now undergoing a major overhaul with fresh investment focused on latency-sensitive electronic trading systems.
This is an opportunity to drive real architectural change, implement automation, and work closely with developers and application teams to redesign the network for performance, scalability, and resilience.
📍 Location: Hybrid, London (3 days per week in office)
🎯 Your mission:
You’ll join a tight-knit, agile team with broad responsibilities across the trading and corporate networks. Your focus will be to:
Drive network automation using tools like Ansible
Re-architect the network to improve latency and scalability
Act as the bridge between infrastructure and trading/application teams
Ensure stable operations and lead troubleshooting in production environments
🛠️ What you'll bring:
Proven experience in low-latency, high-availability trading environments
Strong hands-on knowledge of Arista network equipment and architecture
Proficiency in network automation, especially using Ansible
Deep knowledge of routing protocols (OSPF, BGP) and IP transmission (Unicast/Multicast)
Experience working with market brokers and direct market connectivity
Strong skills in packet-level analysis and root cause troubleshooting
Ability to capture business/application needs and translate them into technical solutions
Previous exposure to firewalls, proxies, load balancers (LTM/Web Gateway)
Nice to have:
CCIE certification or equivalent experience
📌 Key responsibilities:
Design, document, and deploy new infrastructure following "network-as-code" principles
Own high- and low-level design (HLD/LLD) and support knowledge sharing with global ops teams
Serve as the senior escalation point for London-based trading network issues
Collaborate with global peers and vendors to manage implementation and upgrades
Support and optimise monitoring, capacity planning, and incident response
📌 Recruitment process:
Intro call with our Talent Acquisition team
Technical interview
Final meeting with the engineering and project leads
Apply now:
As an employer, MARGO offers equal employment opportunities regardless of gender, ethnicity, religion, sexual orientation, social status, disability, or age. MARGO is committed to fostering an inclusive work environment that reflects the diversity of its teams, and several actions are taken daily to achieve this!
Top Skills
Ansible
Arista Network Equipment
Bgp
Firewalls
Load Balancers
Network Automation
Ospf
Packet Analysis
Proxies
MARGO London, England Office
20-22 Bedford Row, , United Kingdom , London, United Kingdom, WC1 R4JS,
Similar Jobs
Blockchain • Fintech • Payments • Consulting • Cryptocurrency • Cybersecurity • Quantum Computing
As a Network Engineer, provide technical support for critical infrastructure, troubleshoot network issues, manage devices, and collaborate in Agile environments.
Top Skills:
BgpCiscoF5MplsOspfPaloTcp/IpVpn
Big Data • Fintech • Information Technology • Machine Learning • Financial Services
The Network Engineer will design, implement, and maintain scalable network infrastructure, automate network operations, resolve complex issues, and mentor junior engineers in a collaborative environment.
Top Skills:
AnsibleAristaBgpCiscoEosEvpnGitiOSIos-XrJinja2MplsNx-OsOspfPythonVxlan
Artificial Intelligence • Big Data • Blockchain • Cloud • Internet of Things • Cybersecurity
The L3 Network Engineer manages, maintains, and supports network infrastructure, tackles complex network issues, optimizes infrastructure, and collaborates with various stakeholders for improvement.
Top Skills:
ArubaCiscoFortinetHpeJuniperMerakiPalo AltoVmware Nsx
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
