Overview

Senior HPC Cluster Engineer – Linux Performance at Massive GPU Scale

Location: Remote from anywhere in Europe

Salary: tot 160k + 25% bonus

We operate one of the largest GPU infrastructures in the world — 30,000+ GPUs and 10 InfiniBand fabrics across five global data centers. Our infrastructure doubles in size every year. We’re looking for engineers who love getting deep into Linux systems, pushing hardware and software to their limits, and making the world’s fastest AI and HPC workloads run even faster.

Why this role is exciting

You’ll join a small, senior team that works between the hardware and Linux OS layers, solving performance problems that affect tens of thousands of GPUs. This is hands-on, high-impact engineering where microsecond gains matter and every optimization is felt at global scale.

Responsibilities

Profile and optimize Linux kernel subsystems (CPU scheduling, memory management, networking stack) for GPU clusters and InfiniBand fabrics
Troubleshoot and resolve complex performance bottlenecks
Integrate and validate new GPU hardware (KVM/QEMU, PCIe devices, Kubernetes)
Improve monitoring, alerting, and automation for large-scale, distributed systems
Occasionally assist customers in optimizing workloads

Qualifications

Solid Linux internals knowledge, ideally with kernel tuning or profiling experience (perf, ftrace, eBPF, sysprof, etc.)
Experience reading/debugging C or C++ system‑level code
Scripting or development skills in Go, Python, or similar
A background in low-level, complex environments such as HPC, large-scale clusters, or high-performance networking
GPU or HPC cluster experience
InfiniBand or other high-performance interconnect knowledge

What we’re looking for

This is for you if you love solving deep technical challenges, care about performance down to the microsecond, and want to work on infrastructure that pushes the limits of what’s possible.

Linux Developer

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