Systems Engineer, Kernel/Linux

CoreWeave is seeking a highly skilled and motivated Senior Systems Engineer to join our Kernel HAVOCK Team. In this role, you will play a crucial part in the design, development, and optimization of our bare-metal systems from POST through joining a Kubernetes cluster. The team's primary responsibilities include maintaining a custom Linux kernel, various OS images (Ubuntu-based), the virtualization stack (kubevirt/qemu/vfio), and the container/pod runtime stack (containerd/nydus/kubelet). You will collaborate closely with cross-functional teams, up stack engineering teams, and stakeholders to ensure the successful delivery of highly performant and reliable software solutions.

Kernel HAVOCK stands for Hardware - Acceleration - Virtualization - Operating Systems - Containerization - Kubelet

Our Team's Stack:

• Linux Kernel (custom build, currently tracking Ubuntu HWE)
• Intel/AMD CPUs, Nvidia GPUs, DPUs, Infiniband and Ethernet NICs
• KubeVirt, QEMU, SR-IOV, vfio-pci
• Ubuntu 22.04
• Containerd, Kubelet

Responsibilities:

• Develop and maintain tooling to build custom Linux kernels and stateless OS images
• Automate packaging of critical components (drivers, microcode, components with out-of-tree patches, etc)
• Serve as a senior point of contact for hardware issue escalation and troubleshooting
• Collaborate with cross-functional teams to define Linux and OS requirements, specifications, and system architecture
• Analyze and optimize the performance of bare-metal and virtualized systems, identify bottlenecks, and propose improvements for enhanced efficiency

Requirements:

• Must have at least 5 years of professional experience maintaining large fleets of Linux servers
• Deep professional experience with troubleshooting and debugging hardware, OS, and kernel issues
• History of improving system efficiency within different subsystems (network, storage, security)
• Strong familiarity with sysctls, cgroups, iommu, init systems, seccomp/apparmor
• Ability to effectively prioritize and communicate proposed features and fixes
• Strong passion for automation, with a commitment to automating processes comprehensively
• Excellent documentation skills and attention to detail
• Strong analytical and problem-solving abilities

Nice-to-haves:

• Experience with kexec, kpatch, kdump
• Experience building CI/CD pipelines (GitHub or GitLab)
• Opinions about software version control and team collaboration
• Experience writing software tests

CoreWeave is committed to operating as a hybrid workplace, offering employees flexibility in how they structure their time between in-office and remote work. We recognize the significance of fostering connections, collaboration, and creativity within our office culture and its positive impact on our business. Our philosophy operating as a hybrid workplace underscores our dedication to enabling employees to tailor work-life balance to their individual preferences.

For those who do not live within 30 miles of one of our offices, we are open to considering remote work for candidates whose skills and experience strongly align with the role. While we prioritize a hybrid work environment for most roles, we understand the importance of flexibility and are open to remote work for specific positions and specialized skill sets. Onboarding is essential to your success. New employees not based out of an office will be invited to attend onboarding training at one of our hubs within their first month of employment. We continue to foster a collaborative environment by bringing teams together quarterly.