Network Operations Engineer (AWS & Core Network Infrastructure)

Who We Are Our client is a global quantitative hedge fund operating across major liquid asset classes worldwide. The firm combines technology, data, research, and trading expertise to drive investment decisions, with infrastructure teams playing a critical role in supporting global trading, market data, cloud networking, and connectivity platforms. The Network Operations function is responsible for ensuring the reliability, scalability, and observability of both cloud and on-premises network infrastructure across a complex global environment. We welcome applicants from across the globe. Relocation support will be provided for suitable candidates. We Are Hiring Across Two Tracks We are currently hiring for both: - AWS Network Operations Engineer (AWS) - Network Operations Engineer (Core Network Infrastructure) These roles focus on network operations, production support, troubleshooting, automation, observability, and reliability engineering across cloud and on-premises environments. Whether your background is primarily focused on AWS networking and cloud automation or network operations, low-latency infrastructure, and network reliability, we encourage you to apply. Candidates from buy-side firms, hedge funds, proprietary trading firms, exchanges, market infrastructure providers, or other performance-sensitive environments are highly valued. Key Responsibilities - Monitor and support production network environments - Troubleshoot connectivity, configuration, and performance-related issues - Deliver operational changes through automation and controlled deployment processes - Build and improve observability, monitoring, and alerting capabilities - Support network reliability, scalability, and operational excellence - Contribute to automation tooling, CI/CD workflows, and operational processes - Partner with engineering, infrastructure, security, and trading teams - Maintain operational documentation, runbooks, and support procedures Requirements - Experience in network operations, cloud networking, infrastructure operations, or related roles - Strong understanding of networking fundamentals including: - TCP/IP - DNS - IPv4 - Routing concepts - Strong troubleshooting and incident management capabilities - Experience working within production or high-availability environments - Experience with automation, scripting, or Infrastructure-as-Code tools - Strong communication skills and a collaborative mindset - Comfortable operating in fast-paced environments with changing priorities Highly Relevant Experience AWS Network Operations Track - AWS networking services including VPC, Transit Gateway, and Route53 - Infrastructure-as-Code using Terraform or similar tools - Python and/or Bash automation - CI/CD deployment pipelines - AWS networking operations across multiple environments or regions - IPAM solutions such as AWS VPC IPAM or Infoblox - Load balancing technologies (ALB, NLB) - CloudWatch, Grafana, or similar observability tooling Core Network Operations Track - Monitoring and resolving incidents across: - Low-latency LAN environments - WAN networks - Data centre and HPC environments - BGP, Multicast, MPLS, EVPN, VXLAN, or related technologies - Network automation, GitOps, Ansible, CI/CD, and orchestration tooling - Splunk, Prometheus, Grafana, or similar observability platforms - Cisco CCNP-level networking knowledge through experience or certification - Experience supporting highly available global network infrastructure What We're Looking For - Strong troubleshooting and analytical mindset - Passion for automation and operational improvement - Methodical approach to incident response and root-cause analysis - Comfortable taking ownership of production environments - Team player who enjoys working across multiple engineering disciplines Why Join Us - Support infrastructure critical to global trading operations - Work across both cloud networking and large-scale network operations - Exposure to automation, observability, and reliability engineering - Collaborate with highly technical engineering teams in a performance-driven environment - Strong opportunities to develop expertise across networking, cloud, and platform operations Selby Jennings is a Trading Style of Phaidon International (License Number 16S8194)