Senior Linux Systems Engineer

Human Intuition. Machine Intelligence. Relentless Exploration.

The Role:

Responsibilities:

• Infrastructure Lifecycle: Own the end-to-end server lifecycle, including racking, configuring, and maintaining physical hardware in our regional data centers.
• Run OpenShift/Kubernetes in production: Deploy, scale, and operate OpenShift clusters; own cluster lifecycle management, upgrades, node tuning, and workload scheduling for latency-sensitive applications.
• Operate Ceph storage at scale: Architect and administer Ceph clusters, optimize for throughput and latency, and manage capacity.
• Access & Security Management: Manage users, granular access controls, and comprehensive security protocols. Ensure robust backup strategies are in place to guarantee data integrity and system resilience.
• Performance & Latency Optimization: Apply kernel, CPU, NIC, and OS-level optimizations (NUMA, IRQ affinity, CPU isolation, huge pages) to meet sub-millisecond performance targets in live trading systems.
• Production Reliability: Design for high availability and lead root cause analysis on production incidents. Proactively monitor and troubleshoot complex hardware/software issues, respond to and resolve incident tickets within required SLAs, and serve as the escalation point for critical incidents.
• Automation-First Engineering: Eliminate manual toil by leveraging Ansible, Terraform, or Python to automate deployments across bare-metal and virtualized environments.
• Innovation & R&D: Continuously research, evaluate, and implement emerging technologies to build better, more resilient solutions for our hybrid-cloud infrastructure.
• User-Centric Collaboration: Work directly with trading and development end users to explore and implement optimal solutions and applications that enhance both the infrastructure and the overall development process.

You Bring:

• 5–8 years of Linux systems engineering experience in production environments (RHEL/Rocky/CentOS strongly preferred).
• Deep, hands-on expertise with OpenShift and/or Kubernetes — cluster operations, CRI-O/container, resource management, and production troubleshooting.
• Proven experience with Ceph distributed storage — OSD tuning, CRUSH maps, BlueStore, and failure domain design.
• Strong consultative skills — ability to interface directly with developers and traders to translate business needs into technical infrastructure improvements.
• Solid data center operations experience — server racking, cabling, firmware management, and out-of-band access (IPMI/iDRAC/iLO).
• Strong background in optimizing Linux systems for low-latency workloads — kernel tuning, CPU pinning, NUMA topology, and network stack optimization.
• Experience supporting or directly working in financial services or electronic trading environments.
• Sharp debugging skills across the full stack — you can go from a trading alert to a kernel trace without needing to be pointed in the right direction.
• Red Hat Certified Engineer (RHCE) certification is required (or must be obtained within the first year of employment); holding a Red Hat Certified Architect (RHCA) certification is considered a strong bonus.
• You are a proactive, naturally curious person who values transparent communication.

We Offer: