IT - HFT System & Network Specialist - London

B2C2 is seeking a highly specialised HFT System and Network Engineer to join its trading infrastructure team in London. You will bridge the gap between cutting-edge AWS environments and physical colocation facilities, owning end-to-end optimisation of the global trading stack: minimising tail latency, optimising cross-region connectivity, and automating deployment of performance-tuned bare metal and cloud instances. Your optimisations directly translate to competitive edge in execution speed across both CeFi and DeFi exchanges.

What you'll do

• Architect and deploy HFT-grade stacks, focusing on low-latency connectivity to crypto exchanges and internal networking
• Manage the interplay between AWS servers and physical hardware in traditional colocation centres
• Implement deep-level Linux kernel optimisations to minimise jitter and improve performance
• Develop Zero-Touch deployment pipelines using Terraform and Ansible to ensure infrastructure is reproducible and error-free
• Instrument the network for microsecond-level visibility, tracking packet loss, jitter, and retransmissions
• Coordinate with exchanges and providers to manage cross-connects, LOAs, and high-speed transit lines

What you bring

• Proven experience in HFT or ultra-low latency environments where microseconds matter
• Deep knowledge of Linux system internals: CPU pinning, NUMA, kernel bypass, and performance profiling
• Expert understanding of BGP, Multicast, and AWS networking
• Proficiency in Python and Bash, plus Infrastructure as Code tools like Terraform
• Comfort working with high-performance NICs, low-latency switches such as Arista or Cisco, and physical data centre requirements
• Strong communication skills and ability to thrive in high-pressure environments, taking ownership of the entire infrastructure lifecycle

What we offer

• Two discretionary bonus awards per year
• A range of benefits in line with local market practice
• Regular social events, activities, and Social Impact volunteering days

About B2C2

Founded in 2015, B2C2 is a global leader for institutional liquidity within digital assets, providing 24/7 deep, reliable pricing for spot, futures, options, CFDs, and NDFs across all market conditions. Headquartered in London with offices in Paris, Jersey City, Tokyo, Singapore, and Luxembourg, B2C2 serves brokerages, exchanges, banks, fund managers, and other institutions.