Senior Linux Engineer

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We’re seeking a Senior Linux Engineer to design, optimize, and support the ultra-low-latency Linux systems that power our trading strategies. This individual will play a critical role in tuning kernel and hardware performance, enhancing real-time market data pipelines, optimizing network throughput, and ensuring our infrastructure delivers predictable, microsecond-level performance.

• Linux Performance Engineering:
  Design, deploy, and maintain Linux systems optimized for ultra-low latency and deterministic performance.
• Kernel & OS Tuning:
  Perform CPU isolation, IRQ affinity, NUMA alignment, huge page configuration, BIOS optimization, and power-state tuning.
• Profiling & Diagnostics:
  Analyze system performance using perf, ftrace, eBPF, systemtap, and other advanced tools.
• Hardware Optimization:
  Configure high-performance servers, optimize NIC offloads, PCIe layout, memory settings, and validate improvements with microsecond-level benchmarks.
• Networking & Market Data:
  Support high-speed multicast market data environments, tune TCP/UDP stack parameters, and partner with developers/traders to optimize performance across OS and hardware layers.
• Automation & Observability:
  Automate provisioning with Ansible/Terraform and maintain monitoring via Prometheus, custom exporters, low-latency logging, and precise time sync (PTP, PPS).
• Reliability & Support:
  Ensure high availability for latency-critical systems, contribute to on-call rotation, develop documentation and runbooks, and lead root-cause investigations for performance anomalies.

• Linux Internals Expertise: 7–10+ years of experience with Linux engineering (RHEL/Rocky/Alma, Ubuntu) and deep knowledge of scheduling, NUMA, memory, networking, and file systems.
• Low-Latency Tuning:
  Proven experience optimizing production systems for ultra-low latency and high throughput.
• Kernel & Hardware
  
  Skills:
  
  Strong proficiency with kernel parameters, sysctl tuning, IRQ balancing, NIC configuration, and CPU topology.
• Scripting & Automation:
  Advanced scripting abilities in Bash and Python.
• High-Performance Hardware:
  Experience with high-end NICs, FPGA adapters, NVMe storage, or performance-critical compute systems.
• Real-Time Systems:
  Solid understanding of market data, multicast networking, or other real-time, high-throughput environments.
• Profiling & Debugging Tools:
  Familiarity with perf, ftrace, bcc/eBPF, sar, strace, tcpdump, etc.

• Professional Development:
  Work directly on performance-critical systems at the core of a fast-growing proprietary trading firm.
• High-Performance Environment:
  Build and tune infrastructure engineered for ultra-low-latency execution and real-time data processing.
• Startup Culture:
  Agile, entrepreneurial environment with the ability to innovate quickly and have meaningful ownership.
• Cutting-Edge Technology:
  Opportunity to work with advanced Linux systems, NIC technologies, kernel bypass frameworks, and high-performance hardware.
• Comprehensive Health Coverage:
  Includes medical, dental, and vision insurance.
• 401(k) Retirement Plan:
  Helping you and your family plan for a secure financial future.