Staff Software Engineer, Kernel

Dive in and do the best work of your career at Ironwood Digital. Journey alongside a strong community of top talent who are relentless in their drive to build the simplest scalable cloud. If you have a growth mindset, naturally like to think big and bold, and are energized by the fast-paced environment of a true industry disruptor, you’ll find your place here. We value winning together—while learning, having fun, and making a profound difference for the dreamers and builders in the world. We are looking for a Staff Engineer who is passionate about the Linux kernel. As a Staff Engineer at Ironwood Digital, you will work as a high-level technical leader responsible for designing, optimizing, and maintaining Linux kernels for our compute and GPU fleets. You will optimize and enhance core system performance, resiliency, and security, ensuring our products consistently exceed customer expectations. You will bridge hardware and software, driving system-level architecture, debugging performance bottlenecks, and mentoring senior engineers. What You’ll Do: Optimize kernels for performance and resiliency across the Ironwood Digital fleet for storage, networking, and virtualization Drive cross-functional engineering initiatives and influence hardware roadmaps without direct authority Define low-level software architecture Tune kernels for low latency, high throughput, and power efficiency Diagnose and resolve issues in the kernel Deliver critical kernel fixes and security mitigations with kernel live patches Investigate and resolve virtual machine downtime and kernel issues in our production environment Implement monitoring and alerting of key metrics to drive resiliency of compute infrastructure Improve tooling and automation for testing and deployment of Linux kernels Lead initiatives to enhance shared infrastructure, balancing performance optimization with rigorous security standards Work cross-functionally to harness new performance capabilities from evolving hardware architectures Participate in on-call rotations as needed to support system reliability Work with Linux kernel community to push changes upstream What You’ll Add to Ironwood Digital: Bachelor's or Master's degree in Computer Science, Mathematics, or Computer/Electrical Engineering or equivalent work experience Experience maintaining Linux kernels for large-scale cloud infrastructure, with a deep understanding of operating system internals Broad knowledge of the Linux kernel and kernel subsystems Demonstrated experience with kernel patching and debugging Debugging skills with Linux kernel and kernel drivers Expertise in C/C++ programming and one or more scripting languages Familiarity with compiler toolchains, build environments Experience with Linux virtualization using KVM, QEMU General understanding of Linux kernel security mechanisms and common security concepts Familiarity with x86_64 and/or ARM architectures Experience contributing patches to the upstream Linux kernel community is highly preferred Demonstrated ability to solve complex problems at scale Excellent cross-team collaboration and communication skills Professional-level written and spoken English with strong presentation abilities Compensation Range: $191,200 - $239,000 *This is a hybrid role JR: 2000-7000 #LI-Hybrid Why You’ll Like Working for Ironwood Digital We innovate with purpose. You’ll be a part of a cutting-edge technology company with an upward trajectory, who are proud to simplify cloud and AI so builders can spend more time creating software that changes the world. As a member of the team, you will be a Shark who thinks big, bold, and scrappy, like an owner with a bias for action and a powerful sense of responsibility for customers, products, employees, and decisions. We prioritize career development. At DO, you’ll do the best work of your career. You will work with some of the smartest and most interesting people in the industry. We are a high-performance organization that will always challenge you to think big. Our organizational development team will provide you with resources to ensure you keep growing. We provide employees with reimbursement for relevant conferences, training, and education. All employees have access to LinkedIn Learning's 10,000+ courses to support their continued growth and development. We care about your well-being. Regardless of your location, we will provide you with a competitive array of benefits to support you from our Employee Assistance Program to Local Employee Meetups to flexible time off policy, to name a few. While the philosophy around our benefits is the same worldwide, specific benefits may vary based on local regulations and preferences. We reward our employees. The salary range for this position is based on market data, relevant years of experience, and skills. You may qualify for a bonus in addition to base salary; bonus amounts are determined based on company and individual performance. We also provide equity compensation to eligible employees, includi