Network Engineer

Network Engineer — DevOps & Automation

Location: London / Hybrid

Employment type: Permanent

Department: Infrastructure & Network Engineering

About the Role

We are seeking an experienced Enterprise Network Engineer to design, build, automate and operate secure, resilient network infrastructure across data-centre, office and cloud environments for a leading Hedge Funds.

You will combine strong routing, switching and security expertise with a DevOps mindset, using automation to reduce manual change, improve consistency and increase operational reliability. This is a hands-on role for an engineer who enjoys solving complex problems, improving tooling and working closely with infrastructure, security and software teams.

Key Responsibilities

• Design, deploy and support enterprise network infrastructure across data centres, offices, cloud environments and remote-user connectivity.
• Configure and troubleshoot routing, switching, firewalls, load balancers, VPNs, DNS, wireless and SD-WAN solutions.
• Build and maintain network automation using Python, Ansible, Terraform and vendor APIs.
• Develop Infrastructure as Code (IaC) for repeatable, version-controlled network provisioning and configuration.
• Create and operate CI/CD pipelines for network changes, including validation, pre/post-change checks and rollback procedures.
• Manage source control workflows using Git, pull requests, peer review and automated testing.
• Improve observability through monitoring, alerting, telemetry, dashboards and capacity reporting.
• Support incident response, root-cause analysis, performance optimisation and post-incident improvements.
• Implement network security controls, segmentation, firewall policy management and secure access architectures.
• Collaborate with cloud, security, systems and application teams to deliver scalable end-to-end connectivity.
• Produce clear documentation, runbooks and architecture designs for both technical and non-technical stakeholders.

Technical Skills Required

• Strong enterprise networking experience, including TCP/IP, VLANs, subnetting, routing and switching.
• Solid knowledge of routing protocols such as OSPF and BGP, plus switching technologies including STP, VLAN trunking and link aggregation.
• Hands-on experience with enterprise platforms such as Cisco, Arista, Juniper, Palo Alto, Fortinet or F5.
• Strong Python scripting skills for network automation, APIs and operational tooling.
• Practical experience with Ansible and/or Terraform for configuration management and infrastructure provisioning.
• Experience with Git and CI/CD tooling such as GitHub Actions, GitLab CI, Jenkins or Azure DevOps.
• Strong Linux skills, including Bash scripting, troubleshooting and automation.
• Experience with network monitoring and observability tools, such as Prometheus, Grafana, Datadog, SolarWinds or streaming telemetry.
• Understanding of firewalling, VPNs, load balancing, DNS, certificates and secure network design.
• Experience with cloud networking in AWS, Azure or GCP, including VPCs/VNets, transit connectivity, load balancers and security groups.

What We Offer

• Competitive salary and benefits package.
• Investment in certifications, training and professional development.
• Opportunity to shape network automation, cloud connectivity and platform reliability.
• Collaborative engineering culture with scope for technical ownership and career progression.