Senior Infrastructure Engineer
Reactive Markets · Remote · Remote, UK ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Senior Infrastructure Engineer
- Fully remote (UK-based)
- Low-latency networking focus
- No visa sponsorship
- On-call rotation
Join a small, senior engineering team building high-performance trading systems where nanoseconds matter. You will manage the network and cloud estate spanning London, New York, Singapore, and soon Tokyo, focusing on colocation networking and hybrid AWS connectivity.
What you'll do
- Manage low-latency networking across colocation sites including switching, routing, and BGP peering
- Prepare new sites for application readiness, starting with the Tokyo data centre
- Maintain hybrid connectivity to multi-region AWS via Direct Connect and failover mechanisms
- Administer Linux hosts and containers using infrastructure as code practices
- Develop monitoring, alerting, runbooks, and conduct post-incident reviews
- Forecast capacity growth and report progress to TechOps and engineering teams
What you'll need
- 4+ years running production infrastructure in latency-sensitive environments like HFT or exchanges
- Strong hands-on networking skills including MLAG, LACP, VLANs, and BGP
- Experience with colocation cabinets, cross-connects, and vendor management
- Solid knowledge of Linux (RHEL), TCP/IP, and troubleshooting from wire to application
- Proficiency with infrastructure as code tools and containerization
- Working knowledge of AWS networking and ability to learn new stack components
- Methodical troubleshooting approach and clear documentation habits
Nice to have
- Project management experience including timeline ownership and reporting
- Knowledge of kernel bypass technologies like Onload or ef_vi
- Experience with PTP and time synchronisation
- Background in bringing up new colocation sites
- Familiarity with FIX protocol or OTC FX markets
- Python scripting skills for tooling development
Stack
- Linux
- Ansible
- Git
- Terraform
- AWS
- Python
How you'll work
- Remote work based in the UK
- Occasional visits to data centres, primarily in London
- On-call rota shared among the team
- Flexible hours with time off for out-of-hours work
- Changes scheduled outside trading hours including weekends
What you get
- Up to 38 days leave including bank holidays
- Private health insurance
- Pension scheme
- Life insurance
- Dental and optical cashback
- Cycle to work scheme
- Social events and offsites
Hiring process
- Initial video conversation with Talent Acquisition (30-45 minutes)
- Technical deep dive with Head of Infrastructure (90 minutes)
- Leadership conversation with CDO (45 minutes)