- 5 Days Onsite
- We are unable to sponsor as this is a permanent full-time role
- A prestigious company is looking for a Sr.
Linux System Engineer. This is with a trading company, and this engineer needs previous industry experience in trading. The role is focused on Linux system administration, networking, scripting, etc. Responsibilities Administer the firm s Linux server fleet, including provisioning, patching, package management and storage Perform performance tuning, capacity planning, log analysis, and root-cause analysis on Linux hosts Administer NFS storage on
Linux:
export configuration, client mounts, permissions, quotas, performance tuning, and troubleshooting Administer the firm s Microsoft 365 tenant, including Entra ID (Azure AD), Exchange Online, Teams, SharePoint Online, and OneDrive Configure and maintain Intune / endpoint management policies for Windows devices Maintain mail flow, anti-spam, anti-phishing, retention, and data-loss-prevention policies Administer the firm s network infrastructure: switches, routers, firewalls, VPN, VLANs, and wireless Manage core network services including DNS, DHCP, NTP, and certificate infrastructure Monitor network performance, troubleshoot connectivity and latency issues, and coordinate with carriers, ISPs, and market-data vendors as needed Implement and maintain network segmentation, ACLs, and firewall rules aligned with the firm s security policy Own the end-to-end identity lifecycle: onboarding, offboarding, role changes, and periodic access reviews across Linux, Windows, and M365 Manage SSO, MFA, password policies, and privileged-access controls Administer access to internal applications, file shares, mailing lists, and shared mailboxes Run monitoring, alerting, and on-call/incident response for infrastructure and end-user systems Manage workstation and laptop imaging, deployment, and full hardware lifecycle Maintain technical documentation, runbooks, and disaster-recovery procedures Qualifications Bachelor s degree in Computer Science, Engineering, Information Systems, or a related technical field 5+ years of experience in systems engineering, infrastructure engineering, site reliability engineering, or technical operations Deep expertise administering Linux environments across multiple distributions Strong experience with scripting and automation using Python, Bash, or similar languages Experience within proprietary trading, hedge funds, market making, fintech, or other low-latency environments Strong understanding of networking fundamentals including TCP/IP, multicast, routing, switching, and performance troubleshooting Familiarity with configuration management and orchestration tools such as Ansible, Kubernetes, Docker, or similar platforms Experience with monitoring and observability platforms such as Prometheus, Grafana, Nagios, Icinga, InfluxDB, or similar tools Strong troubleshooting and problem-solving skills with the ability to operate independently under pressure
