Senior Linux Engineer

Who We Are

MA Capital US LLC is a proprietary trading firm specializing in systematic and high-performing discretionary strategies across multiple asset classes. We leverage advanced technology, quantitative research, and sophisticated models to capitalize on opportunities in global markets. Our culture is built on innovation, efficiency, and transparency. We are committed to providing liquidity and supporting fair, efficient markets, while ensuring our traders and professionals have flexibility, tools, and continuous learning opportunities to succeed.

Position Overview

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.

MA Capital employs individuals with a passion for innovation and solving hard technical problems. If you’re looking for a place where your deep systems expertise will directly shape the performance of trading infrastructure, MA Capital is your home.

Key Responsibilities

• 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, and 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.

Required Qualifications

• Linux Internals Expertise: 7–10+ years of experience with Linux engineering (RHEL/Rocky/Alma, Ubuntu) and deep knowledge of scheduling, NUMA, memory, networking, and filesystems.
• 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.

Why Join Us?

• 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.