Senior Network Engineer (Permanent) London | Hybrid (3 days onsite) Were working closely with a Network and Security Consultancy looking for a Senior Network Engineer to join a high-performing engineering team, delivering complex data centre and network solutions. This is a permanent role for someone who combines strong architectural thinking with deep hands-on delivery.Youll take ownership of end-to-end data centre connectivity, from requirements gathering and HLD/LLD design through to hands-on implementation, working across network, compute, storage, and security. Key responsibilities Design and implement data centre network architectures (Cisco, Arista) Deliver EVPN/VXLAN fabrics in production Own HLD/LLD and hands-on implementation Design resilient inter-DC connectivity Troubleshoot complex multi-vendor environments Work closely with infrastructure, security, and automation teams Key requirements 10 years networking experience CCIE or equivalent Strong EVPN/VXLAN experience Background in high-availability environments Experience across sectors such as financial services or trading