London Based Trading firm seek a Senior Network Engineer - CCIE or equivalent level of knowledge of networking with specific emphasis on routing and switching. Complex network design and implementation focusing on predictability, resilience and security. Strong understanding of the TCP/IP protocols and network troubleshooting, in-depth knowledge of BGP. L2 and L3 multicast networks, PIM, IGMP, design, operations and troubleshooting. WAN Routing and traffic engineering. NetGen Firewalls, L3 to L7 experience, troubleshooting and implementing. Network automation using available tools and own code. Desirable - Low-latency networks. Financial protocols for order entry and market data, MPLS / VRF-Lite usage. Understands good security practices. Able to write Python code for automation. Experience of working in datacenter and following best practices. Any management or team leading experience highly desirable.