Senior Linux Network Engineer

Itero Group is seeking a Senior Linux & Network Engineer with strong hands‑on troubleshooting skills across enterprise Linux systems, IP networks, and highly available production infrastructure.

• Act as a first technical point of response and primary customer technical contact during production incidents, owning the investigation from initial detection through service restoration and follow‑up.
• Perform hands‑on troubleshooting across the complete service environment, including Linux systems, IP networks, firewalls, Pacemaker/Corosync clusters, Galera database clusters, virtualization, applications, and customer connectivity.
• Diagnose complex Linux and network problems using command‑line tools, logs, monitoring data, routing information, and packet captures using tools such as tcpdump and Wireshark.
• Troubleshoot routing, switching, firewall, VPN, TCP/UDP, performance, and connectivity problems, including packet loss, latency, asymmetric routing, and other service‑impacting network conditions.
• Troubleshoot highly available Linux and database environments, including Pacemaker/Corosync and Galera, with issues involving quorum, failover, cluster communication, replication, synchronization, and recovery.
• Coordinate internal engineering teams, customers, network/data‑center providers, and other third parties when additional assistance is required while maintaining technical ownership of the incident.
• Design, deploy, maintain, patch, harden, monitor, and improve Ether stack's Linux, network, clustering, and cloud infrastructure.
• Perform root‑cause analysis, execute controlled production changes, maintain technical documentation, and develop Bash/Python automation to improve operations and troubleshooting.

This position requires an experienced engineer who can contribute independently in a production environment from the beginning of employment. Candidates must already possess strong hands‑on Linux, networking, and troubleshooting experience. Candidates will be introduced to Ether stack‑specific applications, architecture, and operational procedures; however, this role is not intended to provide foundational training in Linux systems administration, networking, high availability, or production incident response.

• Linux: Strong hands‑on experience administering and troubleshooting production Linux environments, preferably Red Hat Enterprise Linux (RHEL). Candidates should be comfortable diagnosing services, processes, CPU/memory, storage and file systems, networking, security, performance, and application‑connectivity issues from the command line.
• Networking: Strong knowledge of TCP/IP, routing, and switching, with hands‑on experience troubleshooting VLANs, routing protocols such as OSPF and BGP, firewalls, NAT, VPNs, TCP/UDP connectivity, packet loss, latency, and routing problems. Experience with Juniper and/or Cisco infrastructure is preferred.
• High Availability: Hands‑on experience supporting and troubleshooting highly available or clustered production systems, including concepts such as quorum, failover, node communication, fencing, replication, synchronization, and recovery. Experience with Pacemaker/Corosync and Galera Cluster is strongly preferred.
• Troubleshooting: Demonstrated ability to investigate complex problems across multiple technology layers using Linux diagnostic tools, logs, monitoring systems, routing information, and packet captures with tcpdump and/or Wireshark. Candidates should be able to methodically isolate whether a problem originates in the operating system, network, database, cluster, application, or an external dependency.
• Production Operations: Experience supporting highly available, business‑critical or…