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# Principal Network Engineer - Ai Infrastructure Operations - $150,000 - $250,000 A Year - Remote

- **Company:** Youat Nscale
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €150,000.0
- **Contract:** Permanent contract
- **Skills:** LTE (Telecommunication), Artificial Intelligence, Computing Platforms, Border Gateway Protocol, Computer Clusters, Complex Networks, Network Congestion, Data Centers, Software Debugging, Distributed Computing Environment, Firmware, Monitoring of Systems, InfiniBand, Network Architecture, Routing, Open Shortest Path First (OSPF), Remote Direct Memory Access, Reliability Engineering, AI Infrastructure
- **Published:** September 4, 2026
- **Apply:** https://eurojobs.com/jobs/26109517/apply

## About the Role

to improve fabric reliability, performance predictability, and operational maturityDefining standards for hardware configuration, congestion control, routing, firmware lifecycle management, and change safetyPartnering with SRE, Compute Platform, and Network Architecture teams to influence end-to-end system designMentoring senior and mid-level network engineers, raising the bar for operational rigor and technical excellenceDriving measurable improvements in uptime, latency consistency, capacity efficiency, and incident reductionAbout You (Skills / Qualifications)10+ years of experience in network engineering, with deep focus on HPC, AI, or hyperscale data centre networkingExpert-level operational and architectural experience with Infiniband and/or large-scale RoCE fabricsDeep understanding of RDMA internals, congestion management, and fabric-level failure modesStrong expertise in modern data centre routing and control planes (BGP, OSPF, ECMP)Proven ability to debug and resolve
cross-layer issues spanning hardware, firmware, kernel, and application communication librariesDemonstrated ability to lead complex technical initiatives across teams without direct authorityA systems-level mindset, balancing performance, reliability, scalability, and operational costNice to HaveExtensive experience with NVIDIA/Mellanox networking platforms in production AI or HPC environmentsDeep familiarity with distributed training frameworks and GPU communication patternsExperience designing network observability systems for high-cardinality, high-throughput environmentsPrior experience influencing platform or infrastructure strategy at scaleWhat We Can Offer YouAt Nscale, you'll find a collaborative, supportive, and innovative environment where your contributions spark real impact. We're building something extraordinary, and we want you at the core.Highlycompetitive package(base + equity) withreviews every 12 months .Join thefastest-growing tech startup, your chance to

## Description

networking environments in the industry, supporting tightly coupled GPU clusters where network performance directly impacts customer outcomes.We're looking for aPrincipal Network Engineer - AI Infrastructureto provide technical leadership across Nscale's high-speed networking domain.This role is focused on owning the reliability, scalability, and long-term evolution of our Infiniband and RDMA-based network fabrics. You will operate as a technical authority, influencing architecture, standards, and operational practices across teams while tackling the most complex network challenges in the You'll Be DoingOwning the technical direction and operational strategy for Nscale's AI interconnect networksDesigning, reviewing, and evolving large-scale Infiniband and RoCE fabric architectures to support future growth and workload demandsActing as the senior escalation point for the most complex network incidents, guiding deep technical investigations and systemic fixesDriving cross-team initiatives