Senior Network Engineer – FinTech

The Opportunity

We’re working with a leading global FinTech organisation that is looking to hire a Senior Network Engineer into its London engineering team.

This is a senior hands-on position covering the design, implementation and ongoing engineering of business-critical network infrastructure supporting a highly available, performance-sensitive financial environment.

You’ll work alongside senior engineers globally and take ownership across both engineering and large-scale network projects.

Key Responsibilities

• Design, implement and support enterprise and data centre network infrastructure

• Engineer and manage Arista environments, including deployments through Arista CloudVision

• Work across routing, switching, firewalls, load balancing and DNS

• Support CDN and DDoS infrastructure, including platforms such as Akamai / Prolexic

• Contribute to the organisation's migration of workloads into public cloud environments

• Work on new data centre connectivity and infrastructure deployments

• Troubleshoot complex network and performance issues across production environments

• Contribute to network automation and operational tooling

• Work closely with global engineering teams on architecture, standards and technical improvements

• Support highly available and latency-sensitive financial systems

Core Requirements

• Strong senior-level Network Engineering experience

• Excellent routing and switching fundamentals

• Strong hands-on Arista experience

• Load balancing experience, ideally F5

• Strong understanding of DNS

• CDN experience, ideally Akamai / Prolexic

• Firewall and network security experience

• Experience designing and implementing networks rather than purely supporting them

• Background working within complex, highly available production environments

Highly Desirable

• Financial Services, FinTech or electronic trading experience

• Public cloud networking experience across AWS, Azure and/or GCP

• Experience with Arista CloudVision

• Ultra-low-latency networking exposure

• DDoS mitigation experience

• Network automation using Python, Ansible or similar

• AIOps / AI-driven network operations exposure

Why Join?

This is an opportunity to join at a particularly interesting point in the network team's roadmap. Rather than purely maintaining an established environment, you'll have the chance to contribute to major cloud, data centre and low-latency infrastructure projects while working within a global FinTech environment.