Radix Trading is seeking an experienced Network Engineer to design, implement, and manage our complex, low-latency network infrastructure. In this pivotal role, you will operate with a high degree of independence to ensure the reliability, performance, and optimization of our global network. The ideal candidate has deep expertise in networking within fast-paced trading environments and excels at solving challenging technical problems at scale.

Responsibilities:

• Oversee the architecture, design, and strategy for research, enterprise and trading networks.
• Lead the design and deployment of trading network infrastructure, ensuring optimal performance and low latency.
• Troubleshoot complex network issues, ensuring minimal disruption to trading activities.
• Collaborate with internal teams to ensure network systems meet trading application requirements.
• Maintain and improve networking standards across the organization, adhering to best practices and regulatory requirements.
• Work with remote datacenter teams to troubleshoot complex hardware, cabling, and optics issues
• Develop scripts and tools for network automation and monitoring
• Lead initiatives to ensure network scalability and performance in line with business goals.
• Provide expert guidance on networking protocols.

Skills & Qualifications:

• Expert knowledge of networking and TCP/IP protocols.
• Experience with vendor hardware and operating systems, including Arista, Cisco, and Juniper 
• Proficiency in Python scripting for network automation.
• Strong knowledge of Unix/Linux network stack and command line tools. Experience with multicast design, especially in high-performance trading environments.
• Trading network experience is highly desired.
• Results-oriented, highly flexible, team player.
• Strong problem-solving skills and the ability to lead network projects.

Radix Trading is seeking a seasoned HPC Systems Engineer with a passion for Linux, HPC systems and research infrastructure to join us. This role requires the ability to quickly troubleshoot and resolve technical issues, navigate networking and system alerts, and collaborate with internal teams and external partners. The ideal candidate is a self-starter that has experience leading projects end-to-end, fluency in scripting languages, and a proven track record of solving complex technical problems.

Job Functions:

• Own monitoring and performance tuning across HPC applications, SLURM job scheduler, networking, storage, and hardware to optimize workload efficiency.
• Perform root-cause analysis to develop sustainable automated solutions.
• Support and troubleshoot alerts and errors with savvy communication skills to interact with external entities and internal counterparts.
• Keep up communication with new and existing external vendors on technical infrastructure work.
• Keep up communication with new and existing external business interfaces --- day-to-day operation, planning connectivity, and exchange upgrades.
• Oversee communication with others internally - project management across different functions to plan exchange upgrades, hardware refreshes, and other improvements/rollouts.
• Build out and support research, trading, and enterprise infrastructure.

Qualifications:

• 5+ years of HPC system administration/architecture including RHEL/CentOS/Rocky Systems
• Experience with job scheduler and resource management tools such as SLURM, Moab, or Torque
• Knowledge of network storage systems such as DDN, IBM SpectrumScale, NetApp, Weka, or Vast
• Knowledge of parallel file systems such as Lustre or Spectrum Scale (GPFS)
• Experience working with InfiniBand and high-speed Ethernet
• Hands-on experience with configuration management tools such as xCAT, Ansible, Salt, and Terraform
• Exposure to bare metal provisioning — including DHCP, DNS, PXE Boot
• Competence in Python, able to edit and create scripts