Linux Sysadmin & Networking Engineer - Hybrid

Claranet Portugal; Lisboa; Hybrid; EUR 45,000 - 60,000; Full time

Benefits offered by this job

Additional training

Career development

Hybrid work

Competitive salary

Job summary

Claranet Portugal is seeking a hands-on Sysadmin/Engineer for HGW projects in Lisbon. You will diagnose Linux-based Home Gateway devices, analyze network issues, and automate tests with Python or Bash.

You will work in a hybrid Lisbon environment, share knowledge across teams, and contribute to documentation while resolving root causes with solid TCP/IP and Wi-Fi expertise. The role offers training and clear growth within a dynamic telecoms setting.

Qualifications

• Strong hands-on experience with Linux systems, including debugging, system configuration, troubleshooting, and scripting.
• Solid understanding of TCP/IP networking concepts and related services such as DNS, DHCP, routing, and network troubleshooting.
• Experience using network diagnostic and analysis tools such as Wireshark, tcpdump, or similar.

Responsibilities

• Performing advanced troubleshooting of incidents affecting Linux-based Home Gateway Devices (HGWs), including fixed access networks, Wi-Fi connectivity, and IP services.
• Conducting low-level analysis in Linux environments, including shell operations, process management, memory usage, network diagnostics, and configuration review to identify root causes of issues.
• Investigating Wi-Fi-related problems such as coverage, interference, channel utilization, band steering, and performance degradation using metrics, packet captures, and diagnostic tools.
• Reproducing customer-reported issues in laboratory environments and characterizing them through technical evidence, including logs, network captures, and performance metrics.
• Developing and maintaining automation scripts (Python, Bash, or similar) to streamline testing, evidence collection, log analysis, and operational activities.
• Creating and maintaining technical documentation, including processes, analyses, workarounds, and recommendations, ensuring knowledge sharing and traceability across teams.

Skills

Linux troubleshooting

Shell scripting

Python/Bash

Networking (TCP/IP)

Wireshark/tcpdump

Documentation

Tools

Wireshark

tcpdump

OpenWRT

Job description

Claranet Portugal is seeking a hands-on Sysadmin/Engineer for HGW projects in Lisbon. You will diagnose Linux-based Home Gateway devices, analyze network issues, and automate tests with Python or Bash.

You will work in a hybrid Lisbon environment, share knowledge across teams, and contribute to documentation while resolving root causes with solid TCP/IP and Wi-Fi expertise. The role offers training and clear growth within a dynamic telecoms setting.