Senior Network Engineer

Reference: 25880Location: Chicago, IL, United StatesIndustry: Trading FirmPosted: 2026-04-28Contact: Ethan HudsonEmail: View email address on us.fitly.work: 13176505687Senior Network EngineerLocation: Chicago, IL (Hybrid/On-site)About the Opportunity We are seeking a high-caliber Network Engineer to spearhead the design, implementation, and optimization of a high-performance, global networking infrastructure. This role is pivotal in maintaining a low-latency environment for sophisticated proprietary trading systems, offering the chance to drive technical innovation through advanced automation and next-generation architectural prototyping. If you are a self-directed engineer with a passion for building resilient, high-speed systems in the financial sector, this is a premier opportunity to own complex technical solutions from conception to deployment.ResponsibilitiesGlobal Infrastructure Management: Oversee the continuous operation and enhancement of diverse, multi-site network environments, ensuring maximum uptime and strategic capacity expansion.Architecture & Innovation: Serve as a technical authority in designing future-state network frameworks, focusing on reliability and cutting-edge performance.Performance Engineering: Conduct rigorous benchmarking, lab testing, and capacity modeling to minimize latency and ensure seamless scalability across the global fabric.Complex Problem Solving: Lead the diagnosis and remediation of intricate connectivity and performance bottlenecks using creative technical strategies and collaborative troubleshooting.Automation & Tooling: Develop and deploy custom automated solutions for network provisioning, diagnostic monitoring, and rapid infrastructure deployment.Vendor Relations: Partner with hardware and service providers to evaluate emerging technologies and prototype new designs for competitive advantage.Requirements (Must-have)Professional Experience: At least 7 years of dedicated experience in network engineering, with a proven track record in low-latency or high-frequency environments.Hardware Expertise: Comprehensive experience designing and deploying enterprise-grade routers, switches, and security appliances.Protocol Mastery: Expert-level proficiency in tuning dynamic routing protocols and managing complex multicast environments.Modern Fabric Networking: Hands-on experience with EVPN-VXLAN architectures for building robust overlay and underlay networks.Security & Edge: Solid background in managing VPN infrastructure, firewalls, and public-facing internet connectivity.Analytical Depth: Deep understanding of the TCP/IP stack with the ability to perform packet-level analysis using industry-standard diagnostic tools.DevOps Mindset: Advanced scripting and automation skills, specifically utilizing Python and Ansible to manage infrastructure as code.Preferred Qualifications (Nice-to-have)Domain Expertise: Direct experience within the financial services or electronic trading sectors.Physical Layer Knowledge: Exposure to Layer 1 device management and a conceptual understanding of RF network fundamentals.Compensation & BenefitsCompetitive base salary and performance-based incentives.Comprehensive healthcare, retirement planning, and professional development support.#LI-KH1