Senior Linux Engineer

Senior Linux Systems Engineer - (Kernel & Performance)New York, NY (Hybrid, 3 days in office)Highly competitive compensation packageJoin an elite technology and research group at the forefront of global finance, where world-class engineering and quantitative research converge to solve some of the most complex problems in any industry. Their teams are composed of passionate problem-solvers who operate in a dynamic, large-scale, low-latency IT environment. We are seeking a visionary engineer to drive deep optimization and development within the Linux operating system, ensuring the firm's complex trading and research platforms operate with maximum performance and efficiency.The RoleWe are seeking a deeply experienced Senior Linux Systems Developer for our Quant Systems team. This is a crucial, hands-on role for a true low-level systems expert who thrives on optimizing performance at the operating system level. You will be a key technical leader responsible for tuning, analyzing, and developing components within the Linux kernel and user space to support our most demanding HPC and low-latency workloads. You will act as a force multiplier by solving the most challenging performance bottlenecks, mentoring other engineers, and setting the standard for deep systems expertise.Responsibilities:Lead the design and execution of high-impact projects focused on optimizing the performance and reducing the latency of our core Linux-based HPC and trading infrastructure.Develop, debug, and maintain low-level systems software, potentially including kernel modules, eBPF programs, or performance analysis tools, primarily using C, Go, or Python.Serve as a senior escalation point for the most complex Linux systems issues, diagnosing and resolving deep technical challenges related to kernel behavior, performance anomalies, and hardware/OS interactions.Drive the architecture for ultra-performant Linux environments, making key design decisions for production systems based on deep OS-level knowledge.Mentor and guide other engineers, championing best practices in low-level systems development, performance tuning, and diagnostics.Your Experience:10+ years of experience in a senior systems development or performance engineering role with a track record of success in complex, performance-critical Linux environments.Expert-level proficiency in C or Go, with significant experience in Python also valued; proven track record of developing systems-level software (not just scripting).Deep, hands-on expertise with the Linux operating system internals, including kernel tuning, debugging (gdb, perf, strace), eBPF, and systems administration in a large-scale, performance-sensitive environment.Demonstrated experience leading technical projects, driving deep architectural decisions, and mentoring other engineers in systems programming or performance analysis.Strong knowledge of configuration management tools (e.g. Ansible, Salt) and CI/CD concepts.Exceptional communication skills, with the ability to articulate complex low-level concepts to a variety of audiences.