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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # L3 Network Engineer - **Company:** K LAGAN - **Location:** Barcelona, Spain - **Salary:** €48,000 - **Contract:** Permanent contract - **Skills:** Adobe InDesign, Amazon Web Services, Microsoft Azure, Border Gateway Protocol, VoIP, Cloud Computing, Linux, Enhanced Interior Gateway Routing Protocol, Hyper-V, Virtual Private Networks (VPN), Multi-protocol Systems, Python (Programming Language), Nagios, Network Architecture, Network Monitoring, Open Shortest Path First (OSPF), Paessler Router Traffic Grapher, Remote Access Technology, Ansible, TCP/IP, Scripting, Identity Services Engine, Google Cloud, Computer Network Operations, Juniper, Data Center Networking, SolarWinds (Software), Firewall Services Module, Cisco Switches, Workday, Cisco, Vmware - **Published:** November 9, 2026 - **Apply:** https://www.jobleads.com/es/job/l3-network-engineer--barcelona--e3f54eaf66410b54947bdae0c1f503768 ## About the Role * 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. * 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. * Location: Barcelona (Hybrid: maximum 2 days per week on-site, subject to review). ## Description 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. * 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: * 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. * 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. * 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! 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.