Role overview
We are seeking a Senior Network Engineer (L3) to design, implement, and operate resilient, high-performance, and cost-efficient network infrastructure that supports both internal platforms and customer-facing services.
Operating at Layer 3 escalation and engineering depth, this role is part of a collaborative engineering team responsible for delivering robust, scalable, and secure network solutions. The successful candidate will contribute to and influence network designs through governance forums (TDA / peer review), produce and implement High-Level and Low-Level Design (HLD/LLD) documentation, and adhere to structured Service Design and Service Transition principles.
The role includes the delivery of modern spine-leaf and perimeter network architectures, with a strong focus on operational readiness, scalability, and long-term maintainability.
This is a hands‑on senior engineering position focused on technical depth, implementation, and operational excellence. It is not an architecture‑only role, nor is it a ticket‑based NOC position.
What you'll do
Contribute to peer‑reviewed network designs and implement approved HLD/LLD artefacts to ensure scalable, resilient, and standards‑aligned infrastructure is delivered correctly the first time.
Deploy and validate spine‑leaf and enterprise routing architectures to support high‑performance data centre and customer environments without introducing instability or technical debt.
Adhere to governance frameworks (TDA, peer reviews, change control) to prevent uncontrolled configuration drift and ensure long‑term maintainability.
Engineer and optimise complex routing environments (BGP, OSPF, EIGRP, MPLS, advanced L2/L3 protocols) to guarantee deterministic failover, predictable convergence, and sustained network stability at scale.
Diagnose and resolve deep routing and switching issues at Layer 3 to minimise downtime, eliminate recurring faults, and protect service availability.
Engineer and administer en
📌 Senior Network Engineer (Madrid)
🏢 Ilkari
📍 Madrid