Senior L3 Network Engineer - Enterprise & Automation

K-LAGAN; Barcelona; Hybrid; EUR 43,000 - 53,000; Full time

Benefits offered by this job

Permanent contract

Private health insurance

Team building activities

Ongoing training

Company events

Birthday off

Job summary

K-LAGAN in Barcelona is seeking a Senior L3 Network Engineer to join our team. You will drive advanced network operations, troubleshoot complex infrastructures, and contribute to network evolution and security.

The role requires 8+ years in enterprise networking, hands‑on experience with Cisco/Palo Alto/Aruba/Juniper, and strong skills in monitoring, automation with Python and Ansible, and network design. This is a hybrid, Barcelona‑based position offering long‑term stability and a competitive

Qualifications

• Minimum 8 years in network engineering in enterprise or service provider environments.
• Deep mastery of TCP/IP, BGP, OSPF, EIGRP, and MPLS.
• Hands-on experience with Cisco, Palo Alto, Aruba, or Juniper enterprise devices.
• Strong familiarity with VPN technologies and firewall configurations.
• Experience with network monitoring tools: Cisco Catalyst Center/DNAC, ISE, SolarWinds, Nagios, PRTG.
• Knowledge of SDN, NFV, and automation/scripting (Python, Ansible) on Linux/Windows.
• English at C1 level for fluent collaboration.
• Location: Based in Barcelona or relocating to Barcelona.

Responsibilities

• Provide L3 support, lead incident resolution, and perform root cause analysis for major outages.
• Maintain high-level stability for core infrastructure and participate in design reviews.
• Implement security protocols and optimize network flows; configure firewalls and VPNs.
• Automate routine tasks and network monitoring using Python and Ansible.
• Deliver network diagrams, configuration docs, status reports, and incident summaries.
• On-call availability maximum 1 week per month (rotation schedule).

Skills

8+ years experience

Network design

Troubleshooting

Python scripting

Ansible automation

English communication (C1)

Tools

Cisco Catalyst Center

DNAC

ISE

SolarWinds

Nagios

PRTG

VMware

Job description

K-LAGAN in Barcelona is seeking a Senior L3 Network Engineer to join our team. You will drive advanced network operations, troubleshoot complex infrastructures, and contribute to network evolution and security.

The role requires 8+ years in enterprise networking, hands‑on experience with Cisco/Palo Alto/Aruba/Juniper, and strong skills in monitoring, automation with Python and Ansible, and network design. This is a hybrid, Barcelona‑based position offering long‑term stability and a competitive