This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process.
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The role
One of the world's premier algorithmic market makers in digital assets, deploying proprietary high-frequency strategies across hundreds of global venues around the clock. Backed by top-tier investors and operating at sub-millisecond execution speeds, their infrastructure underpins billions in daily volume with zero tolerance for packet loss or downtime.
You will own the physical and virtual compute and networking estate that powers live trading and mission-critical settlement systems. This is not a cloud-dashboard sysadmin job or corporate IT support; you will be configuring bare-metal Linux servers, troubleshooting Cisco switches in co-located data centres, and building Python automation for an environment where every microsecond counts.
The work
- Own and scale the physical and virtual network foundation across global data centres, balancing raw throughput against ultra-low latency.
- Serve as the senior escalation point for production network anomalies, OS bottlenecks, and hardware faults across live trading estates.
- Write Python automation to provision, configure, and audit switches, routing policies, and server fleets without manual overhead.
- Instrument hosts, links, and switches with Prometheus, Grafana, and SNMP to catch microbursts and degradation before traders feel it.
- Plan and execute zero-downtime maintenance windows, hardware upgrades, and cabling overhauls across distributed co-location sites.
What You Bring
- 5+ years managing production Linux environments and enterprise network infrastructure in high-reliability or trading settings.
- Deep, packet-level understanding of TCP/IP, routing, and subnetting, with proven skill triaging latency, loss, and jitter using tcpdump, Wireshark, and traceroute.
- Hands-on experience deploying, cabling, and configuring Cisco Nexus or Catalyst switches, ACLs, and physical server hardware in data centre environments.
- Proficiency in Python for systems and network automation, backed by standard Git workflows.
- Availability to participate in an out-of-hours and weekend on-call rotation for production maintenance and critical incidents.
Why apply through Dex
Trading infrastructure roles at top-tier market makers are tightly guarded, and distinguishing elite engineering cultures from chaotic crypto desks is hard from the outside. Applying through Dex skips agency gatekeepers and gives you direct, unvarnished insight into the team's stack, compensation, and production reality before you step into an interview. Sign up once, skip the cold applications, and get positioned straight in front of the hiring team.
As part of the recruitment process at Dex, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.
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Infrastructure Engineer employer: Dex
At Dex, we pride ourselves on being an exceptional employer, offering a dynamic work culture that fosters innovation and collaboration. Our London-based team enjoys a hybrid working model, competitive benefits, and ample opportunities for professional growth, all while contributing to cutting-edge technology in the healthcare sector. Join us to make a meaningful impact in real-time systems and edge deployment, surrounded by a supportive team dedicated to excellence.
