Senior Network Engineer
Edinburgh
Hybrid
Permanent
£Competitive + benefits + flexible working
FNZ is on a mission to make wealth management more accessible, inclusive, and scalable worldwide. Supporting investment platforms used by over 20 million people , our EU/UK Network Engineering team underpins the critical infrastructure that powers global wealth technology.
We’re looking for an experienced Senior Network Engineer to join our Platform Services function. Reporting into the Network Engineering leadership team, this role will provide deep hands-on technical expertise across FNZ’s enterprise network estate, supporting the stability, performance, security, and ongoing optimisation of our on-prem, hybrid, and cloud environments.
What you’ll be doing
As Senior Network Engineer, you’ll be a key technical contributor within the regional Network Engineering team, helping to maintain, improve, and evolve secure, resilient, and high-performing network services across FNZ.
Your responsibilities will include:
Network Operations & Engineering
Supporting the operation, maintenance, and optimisation of FNZ’s enterprise network infrastructure
Acting as a senior escalation point for complex network incidents and service issues
Troubleshooting and resolving network performance, availability, and connectivity issues
Supporting lifecycle management activity including upgrades, patching, configuration improvements, and infrastructure refreshes
Ensuring network services remain highly available, secure, and aligned to business needs
Design, Delivery & Improvement
Contributing to the design and delivery of network solutions for new and existing systems
Working with Network Architecture to implement new tooling, infrastructure, and network capabilities
Evaluating existing technologies and recommending practical improvements
Helping to enhance automation and reduce manual, repeatable network tasks
Supporting continuous improvement of operational procedures, standards, and documentation
Collaboration & Stakeholder Support
Working closely with Platform Services, Infrastructure, Security, Cloud, and business teams to deliver reliable network outcomes
Supporting project delivery alongside BAU operational responsibilities
Providing clear technical updates, recommendations, and analysis to engineering leads and stakeholders
Translating technical issues into clear business impact, risks, and resolution options
What we’re looking for
You’ll be a highly capable hands-on network engineer who thrives in complex, high-availability environments and understands the importance of secure, resilient infrastructure in supporting business-critical platforms.
Essential experience:
Strong experience configuring, maintaining, and troubleshooting enterprise-class network environments
Experience supporting complex network infrastructure across on-premises, hybrid, and public cloud environments
Strong incident response and problem-solving experience in business-critical environments
Strong understanding of network availability, performance, resilience, and security principles
Technical expertise and practical experience in:
Strong experience with Cisco Nexus switching technologies
Advanced Layer 2 and Layer 3 network design and troubleshooting
Proven expertise in OSPF and BGP routing protocols
Overlay and fabric technologies such as VXLAN and NSX-T
Network security principles and secure network design
Traditional ADN platforms, including F5 LTM/GTM
Desirable experience in the below areas would be advantageous:
Checkpoint and Fortigate firewall solutions
F5 Distributed Cloud
Network automation and orchestration, such as Terraform, Ansible, or CI/CD pipelines
Cloud networking across AWS, Azure, or GCP
LogicMonitor or similar enterprise-grade monitoring platforms
What you’ll need to succeed at FNZ
A strong technical mindset with excellent attention to detail
Calm, structured problem-solving skills in complex operational environments
Excellent communication skills across…