L3 Network Engineer

At K-LAGAN, we are looking for a Senior L3 Network Engineer to join our team in Barcelona. You will be responsible for providing advanced support, troubleshooting, and optimizing complex enterprise-grade network infrastructures, while actively contributing to network evolution, security enhancements, and automation initiatives. 🎯

Key Responsibilities
• Advanced Network Operations & Troubleshooting: Provide L3 support, lead incident resolution, perform root cause analysis (RCA) for major outages, and perform complex fault isolation across enterprise network environments.
• Architecture & Infrastructure Maintenance: Maintain high-level stability for core infrastructure, participate in design reviews, execute network upgrades, and support architecture evolution.
• Security & Optimization: Implement security protocols, optimize existing network flows, configure firewalls/VPNs, and maintain network management systems (Cisco Catalyst Center, ISE, SolarWinds, PRTG, Nagios).
• Automation & Continuous Improvement: Automate routine tasks and network monitoring processes using Python and Ansible.
• Documentation & Technical Reporting: Deliver detailed network architecture diagrams, configuration docs, status reports, and incident summaries.
• On-Call Services: On-call availability maximum 1 week per month (rotation from Tuesday 10:00 AM GMT to the following Tuesday, including the weekend). 💻 Requirements & Core Competencies Experience & Key Technical

Skills:
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Experience:
Minimum of 8 years in network engineering (enterprise or service provider environments) with a solid track record in designing, deploying, and maintaining complex infrastructure.
• Protocols & Networking: Deep mastery of TCP/IP, BGP, OSPF, EIGRP, and MPLS.
• Hardware & Vendors: Direct hands-on experience with Cisco, Palo Alto, Aruba, or Juniper enterprise-grade equipment.
• Security & Remote Access: Strong familiarity with VPN technologies, firewall configurations, and security appliances.
• Monitoring & Management: Expertise in network monitoring tools (Cisco Catalyst Center / DNAC, ISE, SolarWinds, Nagios, PRTG).
• Automation & Systems: Knowledge of SDN, NFV, and automation/scripting tools (Python, Ansible) on Linux/Windows environments.
• Languages: C1 English level (written and spoken) is required for fluent collaboration.
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Location:
Based in Barcelona or currently relocating to Barcelona. Nice to Have (Plus):
• Cloud networking experience (AWS, Azure, GCP).
• VoIP and Unified Communications knowledge.
• Data center networking and virtualization (VMware, Hyper-V).
• Official certifications: Cisco CCNP/CCIE, Palo Alto, or equivalent. Interpersonal

Skills:
• Strong analytical mind, problem-solving drive, and technical ownership.
• Clear communication skills with the ability to convey complex technical issues to diverse stakeholders.
• Adaptability, proactivity, and resilience in fast-paced operational environments. 💰 Offer & Conditions
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Location:
Barcelona (Hybrid: maximum 2 days per week on-site, subject to review).
• Workday: Full-time.
• Salary Range: Around €48,000 gross/year (commensurate with experience).
• Project: Long-term, stable mission supporting critical enterprise network infrastructure. 🌱 K-LAGAN Benefits & Life at K-LAGAN
• Permanent contract from day one, private health insurance, and long-term project stability.
• Team Building: Barbecues, tech meetups, and team events to keep us connected.
• Continuous Follow-up: Periodic 1-on-1 meetings with your Business Manager (BM) to boost your career growth and share feedback.
• Learning & Development: Access to ongoing training in tech skills, soft skills, and languages.
• Special Events: Summer party, Christmas dinner, and Solidarity Day.
• Birthday Off: Enjoy your birthday free—however, wherever, and with whomever you choose 🧡 Our Commitment At K-LAGAN, we believe in people and projects with real impact. We foster an inclusive environment where engineering, technology, and talent join forces, promoting equal opportunity and continuous personal and professional development.