Network Engineer – Trading & Electronic Trading Infrastructure

Network Engineer – Trading & Electronic Trading Infrastructure Join MARGO in the UK (London) – Perm & Contracting Opportunities MARGO is a tech-native consultancy delivering high value-added IT expertise to complex financial markets environments. We work on mission-critical trading and electronic trading infrastructures where performance, latency, resilience and automation are key success factors. Our consultants operate close to trading, application and infrastructure teams to design, transform and operate high-performance platforms. Joining MARGO means contributing to technically demanding transformation initiatives while benefiting from a human-sized structure, close follow-up and tailored career paths. Business Context You will join a trading and electronic trading infrastructure environment undergoing a significant network transformation. After years of organic growth, the network architecture is being rethought with fresh investment and a strong focus on: · latency-sensitive electronic trading systems · scalability and resilience · automation and infrastructure-as-code principles The role sits at the intersection of network engineering, production operations and application proximity, with direct interaction with trading and development teams. Role Overview We are looking for a Network Engineer to contribute to the redesign, automation and operation of trading and corporate network infrastructures. The role combines architecture, hands-on engineering and production ownership. It is suited for engineers who want to work close to trading environments while participating in meaningful technical transformation initiatives. Key Responsibilities Architecture & Transformation · Contribute to the re-architecture of trading and electronic trading network infrastructure to improve latency, scalability and resilience · Design and deploy network solutions following network-as-code principles · Produce and maintain high-level and low-level designs (HLD / LLD) · Participate in technical discussions around network standards and evolution Automation & Engineering · Contribute to network automation initiatives using tools such as Ansible · Help standardise configurations, deployments and operational changes · Work closely with application and development teams to align infrastructure with system requirements · Support integration with market connectivity and broker networks Production & Operations · Participate in production support for trading network environments · Contribute to troubleshooting and root-cause analysis in production · Perform packet-level analysis to diagnose latency, packet loss or connectivity issues · Support monitoring, capacity planning and incident response activities · Help ensure high availability and operational stability of critical environments Collaboration & Communication · Act as a point of contact between infrastructure, trading and application teams · Capture business and application needs and translate them into technical solutions · Collaborate with global teams and external vendors on implementations and upgrades · Contribute to knowledge sharing and operational documentation Technical Environment Core Technologies · Network engineering in low-latency and high-availability environments · Arista network equipment and architectures · Network automation (Ansible) · Routing protocols: OSPF, BGP · IP transmission: Unicast and Multicast · Direct market connectivity and broker integrations Valued Technical Exposure · Firewalls, proxies and load balancers (e.g. LTM, Web Gateways) · Monitoring and observability tools · Capacity planning and performance optimisation · Large-scale trading or electronic trading infrastructures Required Experience & Skills Essential · Experience in trading or electronic trading network environments · Hands-on expertise with network infrastructure and routing · Exposure to network automation or infrastructure-as-code practices · Strong understanding of IP networking, routing and multicast · Troubleshooting skills including packet-level analysis · Experience working on production-critical systems · Ability to work close to application and business teams · Strong ownership and communication mindset Valued (but not restrictive) · Experience with Arista network environments · Exposure to infrastructure transformation programmes · Familiarity with firewalls, proxies or load balancers · CCIE certification or equivalent hands-on experience Why Join MARGO · Access to high-impact trading and electronic trading infrastructure projects · Opportunity to contribute to architectural and automation initiatives · Roles combining engineering, production and application proximity · Close collaboration with trading and development teams · Human-sized consultancy with strong technical standards and long-term focus Please note - We do not offer visa sponsorship for this position. Interested? Motivated? Apply on our website or at [email protected]