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Senior L3 Network Engineer

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Summary

Senior L3 network engineer providing advanced support, troubleshooting, root-cause analysis and optimization of enterprise network infrastructure in Barcelona, leading incident resolution, architecture reviews, and automation, with an on-call rotation. Core stack: Cisco, Palo Alto, Aruba, Juniper, BGP/OSPF/MPLS, SolarWinds/PRTG, Python/Ansible.

  • Provide advanced (Level 3) support, troubleshooting, fault isolation, and optimization for enterprise network infrastructure.

  • Lead network incident resolution and perform detailed root-cause analysis for major outages.

  • Maintain, support, and participate in network architecture design reviews, upgrades, and security implementations.

  • Automate routine network tasks and enhance monitoring processes using scripting and automation tools.

  • Develop and maintain accurate network configurations, incident reports, and technical architecture documentation.

  • Participate in an on-call rotation (up to 1 week per month, running Tuesday to Tuesday, including weekends).

  • Collaborate with cross-functional teams to drive network projects, migrations, and infrastructure enhancements.

  • Experience: Minimum of 8 years in network engineering within enterprise or service provider environments, including hands-on experience designing, deploying, and maintaining complex network infrastructures.

  • Education: Bachelor’s degree in Computer Science, Telecommunications, or a related field.

  • Core Technical Expertise:

    • Deep knowledge of routing and switching protocols: TCP/IP, BGP, OSPF, EIGRP, and MPLS.

    • Hands-on experience with enterprise-grade networking and security equipment (Cisco, Palo Alto, Aruba, Juniper).

    • Strong expertise in VPN technologies, firewall configurations, and network security appliances.

    • Proficiency with network monitoring and management tools (SolarWinds, PRTG, Nagios, Cisco Catalyst Center / DNAC, Cisco ISE).

  • Skills & Competencies:

    • Strong analytical, problem-solving, and advanced fault-isolation capabilities.

    • Excellent verbal and written communication skills with the ability to explain complex technical issues to diverse stakeholders.

    • Ability to work independently with strong ownership, adapt to fast-paced environments, and handle pressure effectively.

  • Certifications: Professional or expert-level certifications such as Cisco CCNP/CCIE, Palo Alto PCNSE, or equivalent.

  • Automation & Software: Knowledge of Software-Defined Networking (SDN), NFV, and automation scripting (Python, Ansible).

  • Cloud & Virtualization: Cloud networking experience (AWS, Azure, GCP) and data center virtualization (VMware, Hyper-V).

  • Additional Systems: Familiarity with VoIP/Unified Communications systems and network architecture design tools.

English is a must Barcelona

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