Trinetix is looking for a proactive and technically skilled Backbone Build Engineer.

Join our team and work with Arelion, one of the world's leading Tier-1 Internet providers, operating one of the largest and most reliable general IP backbone networks. With more than 30 years of experience and connectivity spanning over 100 countries, Arelion delivers mission-critical network services to telecom operators, hyperscalers, cloud providers, content platforms, and global enterprises.

This is a unique opportunity to contribute to the backbone infrastructure that powers the Internet while growing your career in an international, fast-paced engineering environment.

In this role, you will play a key part in delivering critical backbone infrastructure projects, including data center migrations, fiber deployments, and capacity upgrades. Working within a fast-paced, multivendor ecosystem, you will manage supplier relationships and help ensure the timely and successful delivery of services.

Core Responsibilities
- Lead and execute data center and customer circuit migrations.




- Coordinate with third-party providers to install new fiber and deliver services (e.g., tails, cross-connects).
- Work closely with field technicians to verify fiber patching and physical connectivity.
- Validate fiber connections and troubleshoot issues related to DWDM backbone link onboarding.
- Manage escalations and drive resolution for high-impact infrastructure issues.
- Ensure timely and quality delivery of backbone orders by staying on top of supplier commitments.
- Perform network configuration and troubleshooting using CLI across various network operating systems (Cisco IOS, Junos, Arista EOS).
- Requirements
- Solid experience in network infrastructure projects, especially data center migrations and fiber installations.
- Hands-on experience with CLI in a multivendor environment (Cisco IOS, Junos, Arista EOS).
- Familiarity with DWDM systems for verification and troubleshooting of fiber connec

📌 Backbone Build Engineer (Madrid)
🏢 Trinetix
📍 Madrid