Principal Site Reliability Engineer - AI Infrastructure Operations

Principal Site Reliability Engineer - AI Infrastructure Operations

Nscale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI start-ups and large enterprise customers. Nscale enables AI-focused companies to achieve superior results by reducing the complexity of AI development. Our GPU cloud bolsters technical capabilities and directly supports strategic business outcomes, including cost management, rapid innovation, and environmental responsibility.

We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As an Nscaler, you'll build trust through openness and transparency, where everyone is inspired to do their best work. If you join our team, you'll be contributing to building the technology that powers the future.

At Nscale, our AI Infrastructure Operations team is responsible for the reliability and scalability of one of the most demanding AI platforms in the industry. We value engineers who think in systems, lead through influence, and raise the bar for operational excellence across the organization.

We're looking for a Principal Site Reliability Engineer (SRE) to provide technical leadership across our AI Infrastructure Operations domain.

This is a senior, highly impactful role focused on setting reliability strategy, designing foundational systems, and driving cross-team improvements  will operate as a technical authority for reliability, automation, and operational architecture across Nscale's GPU, network, and control-plane platforms.

• Owning and evolving the long-term reliability strategy for Nscale's AI and HPC infrastructure
• Designing and leading the development of large-scale control-plane systems, automation frameworks, and operational tooling
• Defining reliability standards, SLO frameworks, and operational best practices used across multiple teams
• Acting as a senior technical escalation point during critical incidents, guiding resolution and ensuring systemic fixes
• Identifying structural reliability risks and driving cross-functional initiatives to address them at the architectural level
• Partnering with Engineering, Network Operations, and Fleet Operations leadership to influence platform design and operational maturity
• Mentoring senior and mid-level engineers, raising the overall quality and effectiveness of SRE practices
• Driving measurable improvements in availability, MTTR, cost efficiency, and operational scalability

• 10+ years of experience in Site Reliability Engineering, Systems Engineering, or Software Engineering roles operating complex, large-scale infrastructure
• Expert-level software engineering skills, with a strong track record of building production-grade automation and systems
• Deep expertise in Linux, networking, and distributed systems design at scale
• Extensive experience debugging and resolving failures across hardware, OS, networking, and application layers
• Proven ability to lead technical initiatives across teams without direct authority
• Strong systems-thinking mindset, with the ability to balance reliability, velocity, and cost

• Deep hands-on experience with AI or HPC platforms, including GPUs, high-speed interconnects (Infini Band/RDMA), and workload schedulers (e.g. SLURM)
• Experience designing observability systems for high-cardinality, high-throughput environments
• Familiarity with Kubernetes at scale and hybrid or bare-metal cloud architectures
• A history of driving step-change improvements in reliability, scalability, or operational efficiency

At 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.

• 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.

Equal Opportunities Statement

We strongly encourage applications from people of color, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds.

If there's anything we can do to accommodate your specific situation, please let us know.

The responsibilities outlined in this job description are not exhaustive and are intended to provide a general…