Senior Network Engineer

Network Engineer

About IEX

At IEX, we’re passionate about building technology that moves industries forward. Our story began when we built a stock exchange designed to deliver high-performance results for all investors. Our belief is that technology should level the playing field so that opportunity is equitable. We are applying what we learned from building a high-performance stock exchange to build technology that solves for complexity and accelerates growth in other areas.

We aspire to build a trusted, disciplined, and diversified business. Our goal is to build transformative technology without ever compromising our integrity - and we’re just getting started!

IEX is seeking an experienced Network Engineer to join our growing Infrastructure team. In this role, you will contribute to the design, implementation, and operation of high-performance, low-latency networks, including IEX’s new Options Exchange. This role requires expertise in low-latency networking and high-performance infrastructure to support real-time trading operations. The ideal candidate thrives in a high-pressure, fast-changing, and demanding environment, where microseconds matter.

You will also play a crucial role in ensuring the resilience, scalability, and security of our infrastructure.

• Participate in the engineering process to design, build, and manage resilient, high-performance network platforms
• Collaborate with teams to ensure our network supports high-availability and low-latency operations
• Contribute to the capacity planning, performance engineering, and scalability of network infrastructure

• Automate, deploy, maintain, monitor, and upgrade network systems and services
• Design and implement tools to automate network tasks and improve network operations
• Monitor network performance, troubleshoot issues, and optimize the network to ensure reliability
• Configure and maintain high-performance switches, routers, and firewalls from vendors such as Arista, Cisco, Juniper, and Fortinet

• Work with cross-functional teams, including Data Center Engineers and SREs, to maintain seamless network operations
• Provide troubleshooting support and collaborate with vendors and contractors to resolve network issues quickly and efficiently

• Minimum of 7 years of experience in enterprise networking, with a focus on high-performance, low-latency networks
• Strong experience with multicast and network automation platforms, such as Ansible and Python
• Proven experience in the financial services industry, ideally in a High-Frequency Trading firm, Proprietary Trading Firm, or Exchange environment
• Solid experience with capacity planning, network performance tuning, and implementing network upgrades

• Advanced understanding of network protocols and technologies, including TCP/IP, BGP, OSPF, VRF, STP, IGMP, PIM
• Hands‑on experience with network automation and orchestration tools (e.g., Ansible, Python, or similar platforms)
• Familiarity with network monitoring tools and performance tuning techniques
• Experience with firewalls and load balancers
• Experience with BGP traffic engineering
• Ability to troubleshoot packet loss, jitter, microbursts, and network latency issues in real-time
• Familiarity with FIX protocol, FPGA-based networking, and market data feed handlers
• Solid understanding of exchange connectivity, colocation facilities, and direct market access (DMA)
• Prior work with cloud-based trading environments and hybrid infrastructures (AWS, GCP, or Azure)

• Bachelor's degree in computer science, Information Technology, Engineering, or a related field.
• Networking certifications (e.g., CCNP, CCIE, JNCIE, or Arista ACE) are preferred

• Experience working in fast-changing, high-stress environments where downtime directly impacts revenue
• Self-starter with a passion for learning new technologies and solving complex networking problems
• Strong critical thinking and problem-solving skills, with the ability to think both strategically and tactically
• Motivated to take on challenges, with the ability to work…