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:

- 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.

? Offer & Conditions
- 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.

📌 Network Engineer (Barcelona)
🏢 K-Lagan
📍 Barcelona