Note: The job is a remote job and is open to candidates in USA. Nscale is a GPU cloud company engineered for AI, providing high-performance infrastructure for AI startups and large enterprises. They are seeking a Principal Network Engineer for AI Infrastructure to lead the technical direction and operational strategy of their AI interconnect networks, focusing on reliability and scalability of Infiniband and RDMA-based network fabrics.
Responsibilities
- Owning the technical direction and operational strategy for Nscale’s AI interconnect networks
- Designing, reviewing, and evolving large-scale Infiniband and RoCE fabric architectures to support future growth and workload demands
- Acting as the senior escalation point for the most complex network incidents, guiding deep technical investigations and systemic fixes
- Driving cross-team initiatives to improve fabric reliability, performance predictability, and operational maturity
- Defining standards for hardware configuration, congestion control, routing, firmware lifecycle management, and change safety
- Partnering with SRE, Compute Platform, and Network Architecture teams to influence end-to-end system design
- Mentoring senior and mid-level network engineers, raising the bar for operational rigor and technical excellence
- Driving measurable improvements in uptime, latency consistency, capacity efficiency, and incident reduction
Skills
- 12+ years of experience in network engineering, with deep focus on HPC, AI, or hyperscale data centre networking
- Expert-level operational and architectural experience with Infiniband and/or large-scale RoCE fabrics
- Deep understanding of RDMA internals, congestion management, and fabric-level failure modes
- Strong 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 libraries
- Demonstrated ability to lead complex technical initiatives across teams without direct authority
- A systems-level mindset, balancing performance, reliability, scalability, and operational cost
- Extensive experience with NVIDIA/Mellanox networking platforms in production AI or HPC environments
- Deep familiarity with distributed training frameworks and GPU communication patterns
- Experience designing network observability systems for high-cardinality, high-throughput environments
- Prior experience influencing platform or infrastructure strategy at scale
Benefits
- Highly competitive package (base + equity) with reviews every 12 months.
- Join the fastest-growing tech startup, your chance to push boundaries, collaborate with brilliant minds, and make your mark on cutting-edge AI.
- Expect a dynamic progression plan tailored to your ambitions. Grow by trying new things, leading, challenging the status quo, and owning your impact, always with our full support.
- Human-First Flexibility: We treat you as humans first. 🫶🏽 Our flexible workplace trusts Nscalers to deliver, giving you the autonomy to shape your day around life's moments.
- Join our thriving remote-first team. Geography is no barrier to impact or connection. We build seamless virtual collaboration, empowering you, wherever you work.
Company Overview
Nscale builds AI data centers and provides GPU cloud infrastructure that companies use to train, run, and scale large AI models. It was founded in 2024, and is headquartered in London, England, GBR, with a workforce of 201-500 employees. Its website is https://www.nscale.com.