Network Engineer

ScalpTrade is a proprietary trading firm that trades our own capital in the options and equities markets. Our edge is technology: a low-latency stack built in-house and tuned end-to-end, from silicon to strategy. Our engineers work shoulder to shoulder with traders to design, build, and operate the infrastructure that moves markets in microseconds., * Design, implement, and support our production trading network end-to-end - exchange connectivity, colocation fabric, campus LAN, and WAN - with a relentless focus on latency, determinism, and reliability.

• Own our low-latency data center fabric on Arista platforms, including multicast market-data distribution (IGMP/PIM), unicast routing (BGP/OSPF), QoS, and buffer/queue tuning to eliminate microbursting and jitter.
• Partner with exchanges, carriers, and hardware vendors to provision, cut over, and troubleshoot market-data feeds and order-entry sessions.
• Take a data-driven, automated approach to diagnosing complex network issues - packet capture and analysis, gap detection, latency measurement, and root-cause investigation across the full path.
• Build and extend network automation and tooling to manage configuration, deployment, and validation as code.
• Design and improve network monitoring and observability (e.g. Grafana, Prometheus/InfluxDB, Zabbix), and contribute to next-generation telemetry.
• Manage firewall and security policy across the estate (e.g. Palo Alto), balancing segmentation and control with the performance the trading path demands.
• Maintain precise documentation of architecture, configurations, and operational runbooks.
• Own initiatives end to end: requirements, design review, implementation, deployment, and handoff.

• 5+ years of hands-on network engineering experience, ideally supporting a production, latency-sensitive environment.
• Deep, on-box command of IP networking and TCP/IP, switching, and routing - BGP, OSPF - plus multicast (IGMP, PIM-SM).
• Experience with modern data-center switching hardware; direct experience with Arista is a strong plus (Cisco, Mellanox/NVIDIA also relevant).
• Strong troubleshooting instincts across Ethernet LAN, routing, switching, and packet analysis (tcpdump/Wireshark), with the patience to chase down microbursts, jitter, and packet loss.
• Scripting and automation ability - Python preferred - along with comfort in Git and tools like Ansible.
• Solid Linux fundamentals and shell proficiency.
• Familiarity with firewall administration and multi-tier security architecture (Palo Alto a plus).
• Clear written and verbal communication, and a collaborative, low-ego approach to solving hard problems in a fast-paced environment.
• CCNP/CCIE or equivalent depth.
• Nice to have: experience in trading or financial services; exposure to low-latency techniques (kernel bypass, hardware timestamping, PTP)